Let's look past few election cycles:
2010 midterms, Obama presidency. Being popular, "intelligible", and charismatic (albeit corrupt) president.
Dems lose House majority, GOP has 242 seats, Obama fails to regain the House during re-election.
2014 midterms, Obama presidency 2.0. Being popular, "intelligible", and charismatic (albeit corrupt) president.
Dems don't regain the House, GOP has 247 seats this time.
Among comes Biden. Wildly unpopular, no comparison to Obama can be made, one is a smooth talker, evil but very efficient and charismatic, the other an old bumbling fool with the lowest approval ratings in recent US history. Yet, he retains the Senate, and barely loses his House majority.
Cheating wasn't necessary yet during the Obama era, everything was going according to plan. Hillary was supposed to come next and continue the globalist agenda. But, people
decided to throw a wrench in it by electing Trump. The establishment can't afford any more setbacks and has to make up for the lost time. Cheating becomes very obvious but the whole system is so corrupt it manages to gaslight the population into believing everything is fine. They use COVID as an excuse to mail widespread mail in voting and drop off boxes, and extended counting until they can add enough to call it for them and "win".