I'm not sure I'd call it Win/Win/Win. Chicago did OK but IMO it's a Montreal Win/Islanders Win/Chicago moderate loss. Montreal got a solid young player with a floor of a 3C and a ceiling of a top 6C who also adds great flexibility to the top line and strong transition play, hands along the boards, playmaking ability, size, and raw skill the Habs were/are lacking. The Islanders got a very unique #4D who walks in to a perfect situation next to Dobson and can grow into a safe 2nd-pair role for the next 10 years and add a nasty element to their blue line with the potential of becoming a #3.
I like Nazar quite a bit as a prospect and I think he's a nice get for Chicago if they decided they absolutely had to sell at a perceived high on Dach, but the two other teams involved in this series of trades got NHL players that are currently holding their own as a 1RW and 2LD at 21 and 22 years old and the other team got a brand new mid 1st rounder who hasn't played a single game in college yet. It's possible Nazar turns out as a better player than Dach and Romanov in the future, but the expected value here heavily favours Montreal and the Islanders for acquiring players who have passed the biggest prospect filter of all by establishing themselves as legitimate NHL players and who still have development runway left. Nazar is a good prospect but he's not some can't miss stud you have to do everything in your power to get.
I'm not trying to be a dick but the stuff about Dach not fitting Chicago's timeline reads as cope to me. If you think you need 6 seasons to rebuild from the studs then you should fire that front office because there's no reason for it to take that long. Buffalo and Arizona style extended tanking and misery is not something you should be aiming for. It is ludicrous to me to suggest that rebuilding teams should trade 21-year-olds for "timeline" reasons. If you want to justify the trade by saying the fit wasn't right or that he needed a change of scenery, selling high on the player, yadda yadda that's a reasonable position, but if you're trading away 21 year olds because you're planning to be garbage for 6 years that's not a good or smart thing to do.