Why has Looker Studio become so unreliable?

It's been a few months since I started posting here because I keep having problems with Looker Studio. It has always been slow, but now it's also buggy. There's always a problem with data connectors, always a problem with displaying figures. I basically copy and paste the same reports every month and then update the date range and textboxes. There used to be no problems, but Looker Studio probably lowered quota limits or something and now we even get error messages during client meetings. System Errors. Looker Studio is a failure. Hope we switch to a different platform soon.