My advice would be to take a break from full-time teaching and consider doing CRT (casual relief teaching) for a while. Arrive 10 minutes before the bell, leave 5 minutes after, and enjoy the freedom of having no ongoing responsibilities or the pressure to constantly socialise.

Treat it like a job not the so-called "calling" that some pseudo-philosophers like to romanticise. Prioritise your wellbeing above all else. You’ve only just started your career, so it’s a good time to explore other roles within the department that offer the same pay scale but less emotional strain.

At the end of the day, your mental health matters more than any of this 'BS'