One has to ask oneself -" Did America completely fall to bits during Trump's last Presidency? " If it didn't , them it will probably survive another term.
The powers of a President are quite rightly restricted and if the democratic process elects Trump again, then that will be what the voters in America have decided.
Well you can't really blame Trump for Covid but his presidency wasn't exactly great. Whilst it was difficult for anyone to lead people through it he managed to confuse americans with mixed messaging and completely nonsensical 'suggestions' like injecting bleach, whilst pushing false information about invermectin. Whilst he himself was treated with the best medicine money could buy.
Trump also made the US a laughing stock to the rest of the world, worked to undermine the UN and NATO and arguably emboldened other countries to push forward with their own agendas e.g Russia. Yes, it was after Trump but that is because Putin was no longer getting what he wanted out of Trump and had to strike before NATO was prepared (thankfully it was in better shape than he realised). Ask yourself why Putin actively wants Trump in charge, and it's not because he thinks Trump will make America great again!
If his retoric is anything to go by he will be significantly worse this time and intends to load every position he can with diehard supporters as well as moving jobs that were previously protected under his jurisdiction making it possible to oust anyone that disagrees with him. In other words, becoming an Authoritarian leader.
Currently Biden has delivered higher GDP, higher jobs, lower cost healthcare, increased infrastructure spending, increased oil and gas production (not a good thing in my mind but to the average american it will be), decreased unemployment and is enjoying record high stockmarkets.
Not sure why anyone wants to go back to a billionaire giving tax breaks to other billionaires, whilst mostly golfing instead of working.
On the brightside if he gets in hopefully Europe will get it's act together and become stronger than before, hopefully with the UK joining more closely with them.