Catalina 10.15.1 Macbook 12" 2016 overheating & significant Safari slow down

[ColdShadow]

So I've noticed since updating to Catalina 10.15.1 that the Macbook gets really hot (bottom) and Safari also noticeably slower and laggy.
I don't use any heavy software like Anti Virus etc and never had any such issues with any version of Mac OS.
has anyone else experienced similar issues?
I know Catalinain general received critism from many users but I persoinally didn't had any issues before latest update.