running hot, fan on always, battery drain

installed big sur and everything started acting strange:

-battery drains FAST

-just using safari and pages causes computer to heat and fan to run

-was using Chrome, but made the computer feel like it was going to explode

-i tried everything (killing runaway apps within activity monitor; resetting SMC; removing Chrome...

anyone else have these issues?

anyone found ways to fix?

PS: apple, Big Sur is horrible, and there is no easy way to downgrade; please fix this!