OP, you don't seem to be here for advice, I don't get the purpose of the thread.
Your purchase was not mustachian (a ten year old Vibe or Matrix, or moving closer to work, etc would have been). SUVs tend not to be mustachian (higher maintenance costs most likely, due to heavier weight vs a... Vibe or Matrix... leading to larger brakes, tires and so on, which are more expensive).
You have a very high income. You can spend your money as you please. Yes, there are degrees of mustachianism (and honestly, I'm kind've over calling it that; it's common sense frugality). No, you didn't buy a 'gas guzzler', you did as I myself did - bought end of model year clear out new cars, because you wanted to and got a good price.
I would not say buying new cars - including in my own case - is mustachian. It came out that, for me, buying new meant a lot of things that may or may not be worth the money: But primarily, living in Canada, I detest rust; and anyone that leases doesn't undercoat their car. So you can either get something a few years old and hope it's been looked after, or something old and know it'll only last a few years before the wheel wells have holes in them... or you can buy new, and hope to keep for a long time (and undercoat).
And yes, I'm 'making excuses' for my own behaviour. And no, in the light of day, it wasn't the smartest set of purchases, at least on my vehicle... in some ways.
You spent just over 10% of your yearly income on a vehicle that will give you, fingers crossed, little to no trouble for five years. It's cool. But it's not mustachian. It's not frugal. It's "I got a good deal on something" vs "I paid $5k for something that will work for a good while, is solid, in cash, and gets 35+mpg while still doing what I need".
Nobody on a mainstream site would criticize you - they might even ask why you are buying base model vehicles with your income. I'm not criticizing your purchase. But your tone in this thread is relly belligerent.
You asked a question. You got feedback. Now you're arguing with everyone.
(We had a Civic for a number of years, and it was shit with a car seat in the back, facing either way - and that's bigger than a Fiesta).
I'm surprised your car is dying after 7 years, but then I HAVE heard bad things about North American Fiestas. In the UK, they are pretty ubiquitous.