I think only Saido, the club and those close to him really know whats going on.
It would seem from his past behaviour he has some issues, i personally think since Preseason he hasnt done a lot wrong (i may of missed something) i thought preseason and the start of the season he was trying too hard if anything.
Problem is if he is a bit unstable at the moment, it will only take minor things to throw him back a step. The fans understandably are not 100% behind him, but if he is thinking he does want a fresh start and everytime he makes a mistake he gets jumped on the pitch, that sets him back, but you cant blame the fans as from the outside it looks like he has been an idiot, its a catch 22 situation.
I read the statement as he was admitting he messed up, thank the support he had and acknowledging he needs to sort out a few problems (if he is feeling depressed then that is the main thing)
I think if he is looking at staying when he comes back, he would be best to put out a statement saying so, saying again he has been silly and asking the club and fans for a chance, i think most Albion fans would probably give him the chance and if he performs then things build from there.
At that point its over to him, of course it could all be a big smokescreen and he is leaving anyway!