Doom beat the Thing up quite well.
He showed insane durability. And his electro-attacks weren't just bolts of energy, they could also be used to kinetically blasts his opponents in physical combat.
Thor should be able to suck him into the air via tornado though the fight takes place inside a mall. Meaning if Thor flies out of the mall he defaults.
And Thor ain't gonna blast the ground because of the innocents around him.
I'm undecided in this fight.