What's going on with Safari? Latest updates is terrible, bugs in Youtube and etc

If you expect help from your fellow Apple users you will need to be more specific.

Effective defenses against malware and other threats - Apple Community

Millions of people are not experiencing "bugs". Consider contacting the respective website developers; for example if you are experiencing trouble with YouTube contact YouTube.

Safari is consuming 160% of CPU while on websites with java while Firefox on the same pages takes up only 30%. This was not the case before I updated to this version. I'm on a Mac Studio M2.