I haven't seen the film. I heard about this and scene a clip on line where Supermans has a smug smile as he easily beasts Steppenwolf.
So, doesn't this beg the question of why you need the Justice League when you have Superman? What is the point of all the other heroes if Superman can single-handidly solve the problem in a few minutes at best?
The other is a common criticism is Superman is overpowered. Unless you have kryptonite or another Kryptonian outnumbering him nothing hurts him. The complaint is there is no suspense in his films and he is even harder to relate to. Doesn't this film only reinforce that idea?
The movie shows that each member of the JLA has a definite purpose within the team, as WW is the natgural leader and best fighter, Bats can improvise and has gadgets, AM can command the oceans and is physically on par with Diana, and Flash has speed, and is like their version of Spiderman, youngest one cracking lines and in hero worship mode! Cyborg has new god tech, and is privtol in movie.
Superman is shown as being their most powerful member, as it should always be...