The freekick went through his wall because Suarez ducked. You do know walls are implemented for a reason, right? Imagine, for a moment, that we didn't have a wall there. How the actual fuck would Mats be expected to save it then? Once again, go outside and kick a ball around.
Draxler scored far post, not the middle of the goal. That's nearly impossible to save as you have no idea where the striker is going to shoot. As a defender your top priority should be to at least pressure the attacker to make it easier on your keeper. Maybe if you went outside and... you know, kicked a ball around, you'd know that.
Cavani scored near post but, once again, he was allowed free reign to essentially fire a bullet. If Mats is hugging his post slotting it past his other side with just as much power is actually easier than scoring the goal that went in. I'll give you a pass on not playing football on that one though, that's something you pick up specifically playing defense/keeper.