>>105539684 (OP)
it's been oversaturated. Once you've seen one VTuber, honestly most of them are just minor variations on the "haha I'm a woman who totally likes those things that gamer autistic bros do" personality spectrum, and if you aren't completely bought into that then the honeymoon phase will be guaranteed to wear off eventually.
Basically, in short, you grew out of them. Have fun using that time for other pursuits.