You write —
“Democrats could have made this a national issue….”
“They could have promoted redistricting commissions,…”
“If you ask me, all those people who could have made a national issue out of..”

…but for better or worse, they didn’t. None of this was an unknown and none of it changes the fact that the vote was handed to Trump. To concentrate on what Dems could/should have done obfuscates that very real issue.