Love the guy, can't see how anyone could think otherwise. He did his absolute best for the club and just wasn't good enough. That's fine, very few will be. As others have said, it isn't his fault the club kept him on for far too long.
He injected some hope, some pride after that fecking scumbag Mourinho was allowed to treat the club like dirt. He's also left us with a greatly improved squad. I mean, I've seen people argue otherwise but that's just nonsense. This squad is in great shape to challenge at the very top.
I'm glad to see him go for both his and the clubs sake. Let's hope we bring in a positive, talented manager who can get us where we need - and this squad requires - to be, and he finds a job which suits his level (Europa league sort of side at a smaller league would be a nice fit I reckon).