Good for you! Despite the lame nature of my own experiences, I still believe asking for promotions and raises is an important skill to practice.
I'm also mid-20s and have been at my job just over two years since I graduated. As a women in STEM, I hear ALL the damn time how I need to push and "lean in" for my career progress.
I asked about a promotion in May to be implemented in Sept, since it generally takes a while to get through the regimented process at my large company. Promotions are given on a schedule for the most part, and my time was coming up at my two year anniversary. Manager told me they probably won't accept the application for promotion given the climate of downsizing and the fact that the last promotion window of the year was 1 month before my scheduled time. "They don't give promotions early." I pushed my manager and asked him to actually check with the mysterious board of promoters for details. Comes back with the same news. I ask specifically to see the paperwork that I will need to turn in so I can be prepared. In July, I talk to my manager AGAIN and tell him I'm dissatisfied about being stuck without a promotion after getting formal feedback that I am a high achiever-- he holds firm and says we should plan to try again in January.
Talked to my manager during our yearly review this month (Nov) and he says he's not even sure they would accept my application for promotion in January due to the continued layoff climate. Told him I am planning to leave the company for many reasons, but that this culture contributed to my decision to leave. He asked if a promotion and raise would help me stay? Hah. I said it's too late.
Sharing this with colleagues reveals this is a chronic issue and everyone I spoke with has dealt with it. An attempt to comfort me was made by saying, this is just how it is for everyone. This is worse, in my opinion, since everyone is walking around feeling undervalued. I suppose my proactive stance would have worked better at a company with different policies, but I am pretty disappointed at how my concerns were treated.