Start another channel. Done.

You could start another channel, but I understand you don't want to lose the work you put in. If you start another channel the same thing might happen again. I think you need to contact them to understand why you were shut down

Yeah I would just move on and don't give it another thought.

Google acquired YouTube 7,5 years ago. When did this banning happen, back then or just recently?

I'd guess that ban might depend on their policies regarding the type of content you have. You can also get yourself kicked out by artificially boosting the stats of your videos, buying bogus subscribers, or link spamming the video page.

I will say just start another channel ! they have banned you because they might be seein some unusual activities that violates their guidelines.

How were you boosting / promoting your channel? And were you using copyrighted content? Its generally good to tell people so they don't make the same mistakes you did.

And as far as the ban once you're banned you're banned. So make a new account like everyone else said.