Nah, you can't blame them for every loss down the stretch. The team was 22-9 from Sept1 onwards, and 25-10 if you count the couple games before. Yeah, you can nitpick games in that stretch, but you can't expect more than that down the line.
It was really the mid-August swoon that did them in. The tough west coast swing, then going 0-2 vs the Nats and dropping 2/3 to Detroit, just threw them too far out of the running by that point that you couldn't make it up. I know mentally that's about when I crossed them out, "can't even beat Detroit ugh" sort of feeling. They were down to a 5% chance of making the playoffs at that point, and it was really only their miracle run and the Yankees collapse that even got them to play a meaningful game 162.