Not sure how valid this oft repeated narrative is...
Panthers, Bolts, Pens, Blackhawks, Kings... All franchises that had significant cup contention windows (& cup wins) after years of being bottom tier teams for a long time.
We're on season 4 since the cup finals appearance (that Suzuki & CC both experienced).... Season 3 since the actual rebuild.
I get patience is difficult for fans, but from the pov of building a contender, considering the state of the roster & org depth chart at Rock bottom, we're doing just fine.
There's never a guarantee to win. Being patient as we meticulously put the pieces in place to build a big contention window isn't for everyone. Supporting that kind of approach doesn't mean being "fine with losing"...