Easiet way to get out of that kind of situation, set an expectation of content. If an OF person charges to sub AND ppv, don't bother subbing to them. Just sit and wait for their revenue to decline. Yea it may suck to not be the "first" to see it when they do posts, but there's a reason OF isn't considered a social media platform. If you see someone use their body sexually to make income, you aren't a fan, you are a consumer. You are there to buy a service or product. You wanna be nice to them about it? Great! Makes the purchase more amicable. But you are still a consumer, no different than buying food from a cook or grocer, or rent for a living space. Sometimes I can buy content and be rather impressed with the quality of the product I bought, so I am more opted to buy more. If I buy content and I think the quality is poor, I know not to buy from them anymore and look else where.
TLDR Based on your own personal and individual standards, if you don't like she isn't making content frequent enough or of a certain quality, and you are still subbed to her, don't be. Let her revunue no longer sustain her, and she'll either get a job like everyone else (Press X to Doubt), or she'll put back more effort.
PS I feel no sympathy for sex workers who volutarily put there body on the internet. No one forced them to, they chose to. So OF people feeling upsetty spaghetti that they have "ruined their lives or pprospects of dating", they knew that was the risk before they did it, and chose to anyways.