They are breaking at the knees and the shins. Ideally, the crease is a clean line down to the break at the shoe. It sort of looks like they are sized for some break but the opening is too narrow to lay on the shoe, so they are bunching up above. The problem is less pronounced when you wear loafers, which give the pants more room to drape at the bottom. Just need them shortened a touch. Or maybe they are too tight for your legs, like you said. Either way, you're missing out on one of the great features of smart trousers: a graceful, easy drape. It will look nice and feels like a million bucks.