80% fair play to him, 20% are you mad? Can understand not wanting to play against Hamburg, but go abroad man, there are so many lovely places where you can play football.
It's not even as though he's a one-club player, already has 100+ appearances with Monchengladbach and Bayern Munich.
Throwing away a perfectly good career, but I guess we can't bitch too much about there not being any loyalty left in football while also criticizing Jansen.
If that's his real reason he's an idiot IMO but I'd say he just wanted to retire early and this was a decent excuse