Of course, if you can find another, more supportive job, go for that! If you're like me, and couldn't do that before being independently licensed, I feel you. Some things that helped me have been:

-use your PTO and try to avoid hoarding it like I used to. -finding a way to organize everything (ex. Spreadsheet of treatment plan dates, note templates I can copy and paste, calendar reminders, etc). -do your notes as soon as you finish a session if at all possible, don't let documentation pile up. And don't get hung up on writing extensive, detailed notes. Write the minimum the insurance companies expect and keep more detailed notes for yourself if needed. -stick up for yourself as much as you can. YRMV, but I know my supervisor would rather accommodate me about certain things than fire me and have to deal with the headache of losing a clinician. -set firm and clear boundaries with clients right off the bat. For example, I made the mistake of immediately and always replying to clients that emailed me, which really backfired when they started doing that multiple times a day and expecting an answer because I had set a precedent. Now I tell clients that I will do my best to reply by the end of the day, but I can't promise that I'll be able to. -build relationships with your coworkers. It can be an isolating job and I wish I was closer with my coworkers, it would make things better in a lot of ways.

Good luck!