Gonna be the 100th person to chime in:

Hobby dev with a different main profession for 20 yrs here. Its the same everywhere, in any profession. I know, I‘ve had a couple.

In a bad environment, you‘ll never flourish. You wont even know your actual strengths. Please quit, try something else. Not necessarily a different profession but definitely a different team/company.

Most of what you mentioned tells me that you‘re currently in a bad place. If the team is bad, everything else gets spoiled. Sadly, you need experience to tell the difference. It might be great for someone else even, just not for you.

What you could use is some hard evidence to your strengths, your passions and your specific personality. Most likely this is achieved by taking a break. Either a long nice vacation or moving on. But time off is very important. Reflection is the key and it needs time and space.

All the best and dont worry about not being enough or doing badly. You‘re doing allright.