I think you got a bad deal and saw the wrong side of it, and for sure there are bad therapists around. That's why I pushed the formal training thing a bit.
> I don't buy that therapists are good at actually solving people's problems.
You're right. It's a cliche, but they help people who want to change solve their own problems. There aren't "therapists in general" just individual ones. Most all of them are the wrong one for you.
> whatever zeitgeist feel good advice was common on Instagram
That's bad.
If you ever try again shop around mercilessly. Any real therapist will give you a free initial meeting to see if the relationship is going to work. Totally walk out and say "thanks but no" until it feels like something is going on... what that feeling may be is that you hate this person for touching a nerve, or something, but it will be emotional.
> encourage you to sink deeper into whatever problems you have and not address the root cause.
If you can articulate what you think the root cause is you're already ahead. Sometimes that's months of work to discover. The root cause can bring up really shitty stuff that makes you want to quit. And what you think the root cause is might not be the root. Therapy is not just 5Y analysis. Be prepared to find that some major code needs rewriting.
> I imagine the majority of therapists are like this
As I said the majority of therapists are the wrong one for you. The usual distribution. You're probably smart enough to know the bell-curve already - some shit, some brilliant, many that are not for you... a few that are. Good luck.