Generally speaking, they were already in charge of elections & redistricting for a lot of states. The "Independent Legislature" thing the SCotUS kicked to the curb was their only real shot they had for outright "legally" stealing an election. Mathematically speaking, you can only gerrymander a given area so much & that hardly matters for Senate & Presidential elections.
They "caught the car" with Roe vs. Wade & don't know how the fuck to recover from that mistake.
"Wokeness" is about 3 times more popular than the GOP.
The GOP has lost 10 of their last 12 special elections, some of those in areas they were never supposed to lose.
Last time I looked, COVID was still killing 100 very likely GOP adherents every single day in the USA.
Millennials hate the GOP, almost monolithically. Demographics are going to crush the GOP in the next two elections.