This may not be popular but you should, only to improve yourself, consider any mistakes you made and how you might’ve handled the job better. This is part of what your next employer will want to hear.

I am not saying it wasn’t a bad situation, just that you can still learn from it. Maybe, just maybe, the timing of your vacation could’ve been a little different? Maybe you could’ve worded ‘I don’t like the job I’m only here for a year’ a little differently.

Your next employer will have to decide whether the environment was toxic, or you were. Showing growth proves it was them and not you.