Why is the cursor not working properly lately?

Cursor, which I was able to develop from scratch until a month ago, does not even understand the simplest promt and performs incorrect operations these days. You have limited the use of tokens and restricted the models to optimize your costs, but it really works terribly. I will not renew my subscription for the next month and I am looking for an alternative AI IDE. Why would I pay for an application that does not work properly? I hope you will return from this mistake soon and make Cursor usable as before.