USA definitely deserved to lose that spot long ago, but NOT if it means China takes its place - don't think y'all are so special as to be the only world super power. Pre - Xi maybe, but Xi has made it clear they want to go the "world emperor" path and China would also be a terrible Steward. At least the USA doesn't kidnap foreign citizens / expats to make them disappear, or actively trying to annex loca countries anymore.
But we do know that Trump would do something similar (Khashoggi being a good example). The fact is the USA would still be a world leader because the existing economic and military connections it has wouldn't disappear overnight - the only difference is the world would be a worse place.
Although Biden is obviously a terrible candidate, it's just not even a contest that Trump is greatly, significantly worse. The Democrats are definitely seeing a "cry wolf" effect because although previous Republican candidates have indeed been terrible, none (aside from Bush Jr) have really threatened the power structure of the USA as much as Trump term 2 would.
If you still have doubts, read Project 2025. They are literally telling you they will turn the USA into a Christo-fascist autocracy.