It isn't complete. They don't have a super majority in the senate, so any impeachments just won't get carried out. It's also unclear how with all major federal agencies compromised by cronies it would be carried out.
It's good news because it shows how incompetent Trump is at securing his own authoritarian bid, but it is not a victory for democrats. Supreme Court is still stuffed, and worse, all federal agencies have been compromised. I doubt it will simply be a lame duck presidency if federal agencies continue to follow presidential decrees while ignoring congress unless the Supreme Court tells them to. Impeachments can't go through, Trump can still create exceptions from having to follow the law with "pre-emptive pardons", he can still prolong signing bills until he eventually vetoes them, and any investigations preceding impeachments are going to be heavily MAGA partisan by the federal agencies in charge.
The more people hear of "Democrats winning", the more MAGA will spin bad things as "it's their fault, things are now much worse after they won, you can thank us because it's not even worse". That won't matter right now, but in several years, people have shit memories. Democrats haven't won yet, they've just made it harder for Trump after and if they get sworn in next year.