What the hack is going on with GTP 4?

If ChatGPT 4 with f*** 22$ per months with taxes, want to be super slow, slower than GPT 3.5, why we have to pay you?
Then why GPT 4 is so confused when I ask him my regular asks ( with little change from 3 months ago) It answers me super different, and most of the time it responds “I can’t assist you with that” and loss one req!
Who is responsible for this mess?