Hi there,
I'm just chiming in here to express what my personal experience was - hopefully to help you to go a bit easier on yourself and not be too harsh on yourself about the problems you're facing.
Basically, my mid-twenties were the worst time of my life.
I'm 30 now, so, I hope I have a lot more life to live, and hey, there will no doubt be bad times and good times ahead. But I can definitely confirm that being 25 was the time in my life when a perfect storm occurred, made up of a horrible murky mix of other people's expectations/my feelings of failure/apathy about the future/feeling I was wasting my freedom.
I really feel for you - I wish I could give you a hug and tell you that it will definitely get better. It will get SO much better, in so many different ways.
I left highschool convinced I was going to be mega-awesome at life (like every teenager, ever). I travelled in exotic places for 6 months. I came back to the UK, went to uni, collected a long-term relationship, moved in with my boyfriend, graduated with a first. In my final year I gained more experience teaching abroad (a field I was interested in). So far, so good.
Then I couldn't get a job, and sat around my flat a lot, feeling friendless and lonely, and over-privileged, and bored, and pointless. I got a 'worthwhile' job in social care, which was stressful and draining, and nothing that I really wanted to be doing. But, more pertinent to your problem, I remember the overriding feeling of that time was that I had failed spectacularly to live up to my potential. I knew there were problems with my behaviour and my choices, but I just didn't have the energy to try and fix them. I didn't want to make friends, because I didn't have the energy or motivation, and honestly, I didn't even really see the point. I had permanent feminist guilt, exactly as you describe - I didn't judge other women but I sure as hell judged myself. I was constantly aware that I had a lot of free time of my hands which so many women throughout the world/and-all-of-history never had, and I was wasting it. I knew I wasn't ready to have kids because I still wanted time to DO stuff by myself, but I had no idea what the stuff might be. Change the world? Write a book? Start some sort of no-pants-party cult? Whatever it was, I was not doing it. I was sitting around reading, crying, napping, and watching movies, while feeling evil and guilty, spoilt and stupid.
What helped to dig me out of this hole was, basically, getting a bit older and life changing a bit. Sorry to offer such a crappy solution - and I know it didn't feel like a solution at the time - but now, 5 years later, I am a much better, different person.
Just after I turned 25, the following things happened: a break-up, a redundancy, a serious health scare, and then, when I was just about to turn 26, moving back in with my parents, with a life in tatters. And then recovering my health, moving back to the big city, getting a new job, digging myself out of a financial hole and into financial security, meeting a new man and falling in love, getting promoted (and rainbows and freshly cut flowers, etc. Basically everything went shockingly terrible and then got remarkably better).
I had to do a few things:
Let go of the intense anger I felt toward myself. What made me so special? Why wasn't it ok that I was just living a fairly average life? Why did I hate myself for not having written the Greatest Novel Of Our Time? There was a whole big bundle of big-fragile-ego and low-self-esteem that I had to unravel. Once I could afford it, I had some therapy. It made a world of difference.
Completely let go of other people's expectations. I now know that I will not have the perfect CV; I won't be the girl that did That Amazing Thing, I do not have a glittering career; and all the achievements I have made are pretty much invisible to anyone but me.
Really get a grip on what's important. My health problems completely pulled the rug out from under me, and removed the most basic sense of safety from my life. I have recovered and feel entirely more optimistic and happy than I was before the health scare. I monumentally don't give a shit about 'looking successful' anymore. At all. It's a cliche, but it's true - it really has made me feel genuinely grateful for what I have. I thoroughly enjoy watching a silly movie at home these days, and I don't feel bad that I'm wasting my time; I just enjoy the fact that I'm sitting there having a good time, which is kind of a miracle, in the extremely grand scale of things.
After all that, I found that I made new friendships effortlessly, all of a sudden, as if it was no big deal.
I became more politically active, less apathetic, and found that I had energy and actually, deep down, cared about things again.
I started to concentrate on my writing (fiction) and found some small (but much treasured) success in this area. I realised that I had finally admitted to myself that this was the only thing I really wanted to pursue. My day job is just to earn the dough. I'm ok with that.
I went from being in debt to having savings.
Although I have not achieved any great public glittering careery achievement, even so, the lingering feeling of failure has completely disappeared, and it has lifted a weight from my shoulders.
I guess my main point is not to diminish what you're feeling or punish yourself for it. When I was 24/25, I just thought I was a spoilt bored person with too much time to dwell on feelings. I can now see that I was dealing with mental health problems as well as physical problems. I wish I'd gone easier on myself. I wish it hadn't taken me so long to stop giving a shit about what I 'should' be doing, and just be ok with doing what I really *felt* like doing.
It sounds, to be honest, that you are already doing immensely well, and handling all of life with self-awareness, careful thought and a lot of motivation. I am definitely not saying that you would need to go through a bit rollercoaster of events/emotions to change - I actually think you're already really on top of things. I hope that you can give yourself a very well deserved pat on the back, or at least, an acknowledgement to yourself that you're kinda nailing it right now.
I wish you all the very best wishes in the world - I'm sure you'll find a way to be that feels entirely right for you.
Finally: this is why I HATE the obsession in the media/culture with youthfulness. Getting older is the best thing ever.