It's true that he can play better than this, and he's probably carrying some pressure on his shoulders. He's a player who clearly wants to make it here, his contract is ending and he's having his last chance to make it possible. So when he starts a game he looks a bit nervous and insecure. His current battle is to overcome this pressure, be calm and start showing his class, starting by reducing the basic mistakes and then with confidence do better things.
For me it's clear that the current staff is seeing something in him, because leaving the fix starters aside he's the one who plays more at midfield. If Ole asks the club to keep him I can see Andreas becoming a solid squad player, and who knows what else in the future. I'm completely sure that once he leaves or gets a contract he'll release that pressure and will show much better stuff. But if he wants to remain it needs to start from him, by showing personality and winning that mental battle. I hope he does.