Here, Ove becomes trapped by his memories. He's never truly won anything from the white shirts, and this parking victory is small compared to the larger goal. His experiences fighting for Sonja were largely unsuccessful and certainly draining, hence his loss of hope here. Notice, though, that this is the first time we hear of Ove crying. This suggests that it's possible he's beginning to actually grieve and recover, rather than just pretending as though Sonja is still around.