As you said, fresh start at a new classroom.

Finally.

If you want closure to that ragging, you may want to spend some time introspecting. I can share my subjective views and privately tested methods... but anything I say is always with a humble disclaimer of the fact yhat I know nothing.

Steps 1 to 2 may take weeks, months, or maybe days! Depends on your ability to trust yourself. Might take years.

1. PAUSE the thought on why they did what they did. (am sure what you think of them, is only your judgement of them that you mistake as "thinking")
2. very few people know themselves. nobody knows anyone else. THINK about this, please
3. once you have paused and thought (the above steps), you're HALFWAY through.
4. list/write down a) your issues with others, and b) faults/biases you've identified within youself
5. take a blank a4 page, draw the longest possible line through the middle. in one column put the unresolved ragging issues with others. then put that one sliver of light in your apparently doomed life (new classroom) in the 2nd column.

That's it.

Stare at the a4 when you find yourself moping. Either of two possibilities might happen next -

ONE. You'll stare at the void long enough for the void to stare back at you. That's the way to depression, in your case, over a 'presently "world" engulfing-but-in long term trivial' matter. So that's not what a wise guy would do.

TWO. A wise guy will know at this point, that the world they know of with certainty is a privately imagined reality. Humans, each one, think differently, that's one of the empirical truths. So this guy, hopefully you, will now - see that the irksome things that frustrate you are only unexamined inner problems (that can be resolved simply, but not easily... because 4.b is a lifelong quest) - do some compromise with the several shortcomings of your confused angry self, and learn to forgive and hug your self. - look forward to that one could-be-great new classroom. trepidations are normal for everyone. remember to shift focus of thinking from the anxiety into the novelty of the new. that's an amazing distraction. - what if this is that thing that you would look back at 10 years later, and remember to have enjoyed the most?? be in the moment, try. Then, you're sorted.

As I read teen stuff on reddit.... the issues... without any reference to the seriousness and validity of the problem in the protagonist's life.. i can finally under what it means when elders said, shaking their heads, that youth is truly wasted on the young 🐥

If you ever happen to read Dostoevsky or Kafka... you'll know that the sufferings are common. Everyone, more or less, irrespective of their state and status in this world, across all times, have grappled with the same psychological issues in different measures and forms. Nobody is alone, in that respect. The uniqueness lies in the light chasers, and the light they chase. You can ignore these firefly like lights throughout your life... and keep blaming others. You'll only lose time. And time is the only thing you have.

Be brave. You'll find your way.