Thor losing to Superman is the worst writing possible.
Thor is equally as fast, approximately as strong, (anyone who thinks he can only lift 100 tons max has never picked up a Thor comic,) and he's more powerful. Thor is a thousand times the fighter that Superman is, and he has divine magic at his disposal, Supe's number 2 weakness.
There is no way in hell Superman should win.
BTW, Juggernaut resists magic. That's one reason he beat Thor.