Behaviour management is so hard, constant conflict, constant battles.
I taught FE for a year and it drove me out of the job in the end. There were just too many students, who were quite frankly, disrespectful little shits who took great delight in acting out and ruining lectures for those students who did want to learn.
If I'd had a classroom full of the respectful, nice students, I would still be teaching now. No question. I loved that aspect of the job and even the late nights marking and planning would have been worth it.
I tried my bloody hardest to stay on top of the bad behaviour, but when it's 5 against one, with very little in the way of sanctions and consequences then it's just a losing battle.
I don't know how things differ in secondary in terms of dealing with bad behaviour but in FE, getting sent out of the class or to the programme head for a talking to just wasn't enough, they didn't care! In my opinion several of them should have been kicked off the course because the were there only to be disruptive, but of course that never happens.
Teaching staff have to bend over backwards, cajoling and encouraging and passing students at any cost - no one must fail! I mean, what kind of life lesson is that? You can be rude, disrespectful, lazy and have zero motivation, but you WILL pass the course.
I'm sorry you are in this position at such an early stage, much like I was. I agree that if you can, give it another year. Easier said than done I know.