Most countries have deep economic ties to most wealthy countries, we're in a global economy. Even subsistence farmers in subsaharan Africa buy more of their seeds than you can imagine from Chinese companies that do the bulk of their R&D in the US and western Europe, if US policy becomes extremely isolationist that will affect them.
Also, the US is one of the biggest climate emitors, if that ramps up instead of decreasing the whole world will feel that too.
Best of luck!
Some of it is 100% misogyny, I think some of it is also that 4 years ago the country was literally on fire in a lot of places and Trump was obviously to blame for a lot of it, so it didn't matter so much to apathetic voters if Biden's messaging was weak. Kamala may have won then too, though misogyny would have made it closer. Now the country is much more stable but still not great, but Democrats are in charge and therefore obviously to blame, so people who largely haven't been affected negatively by the Republicans (e.g. men, especially non-desperately-poor white men), are apathetic again