I don't dispute any of that. And ultimately Wenger did deserve to be sacked.
But redgunamo's point still stands. People talk about the last decade of Wenger's reign being one of decline, but it's worth noting there were various points during this period - often deep into the season - when people were entertaining the idea of us being title challengers. To me this suggests that people now have a slightly skewed perspective on how those years actually played out, in part because the last season was his worst.