This is one of those '2 things are true' moments, I think Republicans hoped their aggressive gerrymandering would deeply entrench white minority rule Instead it extra motivated voters and they got their asses kicked But the gerrymandering lessened their losses, and increased the burden on voters
"If every congressional map had been drawn fairly, with party-blind nonpartisan methods, Democrats might have come close to winning a veto-proof two-thirds majority in the House, with the party winning nearly 20 additional districts in Texas, Florida and Georgia alone."