Hey Thomas, I feel the same way about this year. It's been very difficult and I, too, have a "good" class and "bad" class. There's one where I have a discipline issue every day and another that looks like it could be one of those Teach Like a Champion videos they show to new teachers. Regardless, it is so hard to feel bad at this. It's some consolation to know all your colleagues are also struggling with the same things and we as human beings can only do os much, but it's also hard to see people quit.
Since I'm in special ed, this year has made me doubt whether I'm really a good teacher, too, despite everyone telling me so. I'm thinking deeply about joining the dark side (admin) in being an IEP chair, where I can play more to my strengths in paperwork and compliance, but there's always some guilt in fantasizing about leaving the classroom..