I agree with everything you said. I feel the same exact way, I don't know what it is, but I'm really into her and every issue you stated is so damn true. Only thing in my opinion would slightly variate from yours is that I think the inconsistency is the biggest problem. Even if she did not drastically improve her lackluster content, but provided videos on much more frequent bases like once per week (which is very doable, she is just slacking her ass off), then all the shitty and cringy production could be easily overlooked.
But no, she has to act like a dad who goes after cigarettes and each time disappears to who the fuck knows where, just to eventually return without bringing you any snack as even the smallest form of compensation for acting like a prick.
My fantasy vision - she does her masturbation / toys / sex in her actual full body cosplays, starting with the whole cosplay and slowly stripping down or whatever, to me that would be insanely hot and people would buy it!
Things that she is doing now cannot even be labeled as cosplay anymore, fancy piece of lingerie that you can just buy in some premium over-priced stores. Ironically she sometimes spends more time on decorating her background than dressing herself up.
My wish probably will never become true but a desperate man can dream, eh..?