Everybody wants to win. That it hasn't happened since the '70s is not necessarily an indictment on Snider and/or any of the GMs. If you want to measure success solely by recency of winning the Cup, then yes, Ed Snider sucks. But if you want to measure it as consistently contending for the Cup, then Ed Snider is easily a top 3 owner in the NHL.
Either way, I prefer looking at individual seasons separately, i.e. in '80 there was the blown offside call (plus the fact that the Islanders were a burgeoning dynasty.) '85 and '87 they ran into Gretzky and co at their peak. The management clearly didn't lose them those series'. Now, there was the whole late 80s early 90s debacle where there can be criticisms made, and everyone has an opinion on the Lindros trade in hindsight, but the Flyers did get back into the finals in '97 and **** the bed big-time. Not sure you can blame Snider or Clarke there, though. 2010 you can blame Holmgren a bit for the goalie situation, but then again, can you call that season a management failure?
If the team you put together is playing in the Finals, you did a good job. But in the end, IMO, the players have to play and they deserve most of the credit when they're winning and most of the blame when they're losing.
Oh, and from a previous thread:
Team || Finals Appearances since 1967
Montreal Canadiens || 11
Boston Bruins || 9
Philadelphia Flyers || 8
Edmonton Oilers || 7
Detroit Red Wings || 6
Chicago Blackhawks || 5
New Jersey Devils || 5
New York Islanders || 5
Dallas Stars / Minnesota North Stars || 4
Pittsburgh Penguins || 4
Calgary Flames || 3
New York Rangers || 3
St. Louis Blues || 3
Vancouver Canucks || 3
Anaheim Ducks || 2
Buffalo Sabres || 2
Carolina Hurricanes || 2
Colorado Avalanche || 2
Florida Panthers || 1
Ottawa Senators || 1
Tampa Bay Lightning || 1
Washington Capitals || 1
I just can't see how Snider is a problem...