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The people who voted Trump and don't wear the paraphernalia occasionally check news and from what I can tell aren't regularly doomscrolling. They'll probably get disagreeable if you talk politics with them. But in general daily interactions, they are polite and helpful. (Not to say I agree with their vote-- you're just asking about their temperament.)
But to a person the diehards I've met seem to be plugged in for a good portion of the day to their devices for outrage porn doomscrolling and posting incrementally angrier content.
Digression-- One time I looked up a Bill Burr bit about sandwiches on Youtube. For weeks it recommended manosphere bullshit and white-supremacist-adjacent conspiracy theory content.
MAGA is just one of the set of social media users who, for various reasons, clicked their way down those recommendation rabbitholes.
I'd bet there are at least a dozen devs reading this who could find the exact commit that Youtube began sending a predictable portion of their userbase down radicalization rabbit holes like these. Perhaps some time in the future there will be a memorial where that diff is etched in a large slab of stone.