I oppose gerrymandering but…
Republicans did aggressive gerrymandering after the 2010 census and got a big advantage from it. Now, Democrats are fighting back and Republicans are whining about it.
Democrats didn’t have a choice. They had to gerrymander since Republicans were going to keep doing it. Most Democrats (but not Republicans) support ending gerrymandering. Maybe some Republicans will change their mind now that they see Democrats will do it too.
One thing I haven’t seen addressed. Even if Democrats pick up seats this time, aren’t they still probably net behind Republicans in gerrymandering if you consider both 2010 and 2020?