However, to the original commenter's point, there are absolutely reports of people on all sides of transition who wish they hadn't messed so much with formative biology.
I genuinely didn't read beyond this because it's so disgustingly close to anti-trans rhetoric. However, I will operate under the assumption that was not your intent.
Anecdotally, I have never met a single person who thought they went "too far" and most are in the same boat I am, wanting more but unable to do anything due to prohibitive costs. That's not "severe body altering" stuff it's literally just estrogen. I am spending about 50% of my pay just so get the bare minimum. Most of the trans people I know who aren't able to get anything else done are men trying to get top surgery.
Non-anecdotally, the only studies I've ever seen (which an argument could be made I don't see these because I'm not looking) are studies showing the exact opposite- the overwhelming majority are satisfied with the progression of their transition, or wish to do more, with less than 1% of trans people having regrets.