Career Confidence and Struggles

tldr: had a bad working experience the past 6 years, mostly shitty jobs, always lose office politics (even though I always avoid the politic games), coorporate environments drove me insane this year especially. It's at the point where I don't know what to do in my life anymore and I genuinely lost my confidence.

Has anyone else been in this situation but came out the other side happier? If so, how? I'm tired of feeling trapped and miserable my adult life. I feel like I'm gaining mental issues.