It’s possible that he can’t read – or has difficulties. He certainly speaks as though he is proud of himself for forming a sentence. He’s often so proud, that he has to repeat the sentence a few times.
But the thing that is bad about Trump is his right-wing politics. Liberals love to call him a felon or orange or orangutan, as though that makes him worse. Remember when they used to focus on the size of his hands and insinuate that it meant he had a small penis?
Here’s the thing. There are things to criticize Trump for without demonizing felons or those with limited literacy or making small penis jokes. Those things just make the arguments against his politics seem insincere. It’s like when Republicans used to talk about the size of Hillary Clinton’s ass or her clothing, rather than her politics (hint: they didn’t really oppose her politics).
Is basic literacy an important skill for a US president to have? I don’t necessarily think so. It’s mostly a figurehead position, and is used to bring in votes for the wing of the uniparty so they can play the whole “democracy” thing.
I’d take an actual leftist who couldn’t read, was a convicted felon, had bad skin, no hair, was not attractive, and could hardly speak over any president we’ve had in US history.