Sounds to me like the issue is not the misaligned tail. I'm sure it looks worse in person, but that should easily trim out, and probably only result in your plane not tracking straight through loops.

You receiver could have an issue. Double check that the frequency crystal didn't come loose. Double check all your control rods to make sure there is no slop nor are they binding.

I don't think the alignment is worth fixing on that plane. It's not that bad and it's only a trainer.