Trump has been going on about it should be very clear he lost early in the tally. If it’s even close, as far as I’m concerned the USA has lost even if Biden ends up winning. Anything but a landslide will reflect poorly on the USA.
As a Canadian, I can perhaps see why you just fail to understand the Electoral College system we've had now for...darn near two centuries. This Time magazine article explains in context to a recent Supreme Court ruling:
Unfortunately, the myths surrounding the Electoral College are powerful enough that politicians from non-battlegrounds are likely to vote against their own states’ interests. If the Electoral College math starts to decisively favor Democrats, we might get a constitutional amendment. Until then, we probably won’t.
We've intentionally made change difficult.
Anyway, back to the original topic. Election Day can't be changed. What needs to be changed is the apathy of the totality of the American electorate.