I've been to vancouver it felt way cleaner than Montreal ...
I'm not self-hating I couldn't live outside Quebec because I'm French and I like to speak french on a daily basis but yeah Montreal feels kinda left behind tbh
Some would argue that the protection and reassertion of the French Language during the Quite Revolution, and subsequent Nationalism of Separatism is what left Montreal behind. Sun Life for example was pretty outwards in their disdain for the language laws and was the reason for their move from Montreal to Toronto.
My parents have interesting stories of living in Montreal before the 1960's and I can understand how history ended up playing out.