the reason? simple. one person, one vote. all votes should be equal. i get the reasoning behind the college, that like the senate, there could be a way to level the playing field with small states v highly populated ones. but so what? if you support the electoral college, you dont think all votes should be equal. you can't claim to think that at all. we should be democratic, if a state has more people, it should have more power.... one person, one vote.
as far as the politics of it, even Trump wanted to abolish it before he became president. like all things political, his beliefs have changed vastly when he became president, and are made only to benefit himself and be a stooge to the republican party. all the republicans who support the college probably didn't before trump, either. as for me, ive never supported the college, way back to when i was a kid, well before even Al gore lost to the college while winning a majority vote, well before it was clear that the college is the only way republicans can win.
if you support the college, will you here and now explicitly acknowledge that you dont think all votes should be equal?