When I start an autobet in different websites
You're running an auto-bet program and you're wondering why your PC is running hot? Are you sure you know what you are doing?
This is not normal. I don't think running auto-bet should cause the temperature of your computer to rise. How heavy are those bots that causes high CPU usage that results in high temperature? It is probably the browser or it is the casino that has a badly optimized auto-betting feature causing high CPU usage.
So far never heard anyone complaining about a problem like this. So highly likely this is just an isolated incident.