Given that I'm not a content creator and my YouTube consumption is mainly for education and a few carefully curated news reporters, I'm not the guy from whom you probably would want advice. So here's some advice!
I'd just find someone you can create content with on a regular schedule and make a clean break. Use what worked and/or what you liked from before, and make something new. Rough relationships color everything, so move forward and take the best along with you.
Just my thoughts.