Power scales vary from writer to writer. Superman could be throwing down with Darksied and the two can be evenly matched or he could get his ass kicked by a random c-list villain.

Any character can be broken with the right writer. Remember how two guys crunched a bunch of numbers in how strong Supes was and that resulted in him blowing up the Earth in a fight with Son Goku?

The same DC that had Batman turn a super genius into having as much physical capabilities as Stephen Hawking also had the latter waltz through all the Justice League like it was nothing.