Because 99% of DC characters are stupidly, hilariously overpowered. To the point they've been nerfing them for 50 years and they're still many tiers above Marvels heavy hitters.
Green Lantern is practically a god, Flash has an entire suite of absurd plot device powers on top of being faster than the speed of light. WW is almost as fast, strong, and durable as Supes AND she has magical weapons and armor. Even their lower tier guys like Aquaman are stronger than the majority of marvel heroes. The real problem is DC gives a lot of guys super strength, durability, and speed. Meaning unless you were functionally retarded. you would rip other godlike characters apart before they knew you were there. Super strength plus super speed equals SUPER op.