It’s a 10-year old profitable company. Why are they bad?

Amen! As professionals we are supposed to have opinions about these issues. This "everyone's right" thing, while well intentioned, is one of the factors that allows, frankly, dysfunctional dev teams like the OP's to exist. If companies are never really wrong for doing things a certain way then nobody can challenge them, which of course is exactly what insecure and egotistical leadership wants; little serfs to do the bidding of a few anointed priests. We should care because we actually do have a responsibility to the world we live in. We are the ones building the buggy, insecure, dark patterned crap that HNers take part in complaining about. No one being wrong means more crap for everyone.

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OP, your employer sucks. You are not wrong; they are. You have to make 1 PR a day? Bullshit of the highest order. Since they are unlikely to be receptive to change, always say "yes sir" with a shit eating grin while you prepare to monkeybranch to another job. I'd have said to quit now a few years ago, but the job market is so bad right now that the best you can do is coast where you are right now while finding new opportunities.

That said, welcome to this stage in your career. Lots of companies hire people with our level of experience to deal with their dumbass mistakes while ironically promoting the same dumbasses who continually make those mistakes.