Everyone says this but it's not my experience.
I flew them twice YUL
and the product was just fine. The price was inline with the other carriers and so I chose them for the convenience of the nonstop.
Service was good and all of my requests for extra "whatever" (food, drink, etc.) were granted without hesitation. During quiet time they set up a little self serve food station in the galley where anyone could go there and help themself to a drink/snack. IFE was passable, flights arrived/departed on time, etc.
Nothing fancy, but definitely not crap in my book ... perhaps I got lucky.