You're seeing what you want to see so it fits with the narrative that people are hating on Vegas for being a new team and succeeding. People also hated that Tampa did it, if they didn't, Tampa wouldn't have made a shirt to mock what they did with Kucherov. Chicago was quieter because it was the first time that happened.
Also the difference between Tampa/Chicago vs. Vegas is Vegas doing it for the second year in a row, plus this has now become common. First time Chicago does it? Raises eyebrows. Second time Tampa does it? People hated it and some put an asterisk on their cup. Third time Vegas does it and then now fourth time? Yeah people are going to be annoyed. If some other team did the same, people would be just as annoyed. Yeah some may hate on this more because its Vegas, but there's a lot of people who hate this because its against the spirit of the rules even if technically legal.
Re: whether the players want it or not, you're making an assumption that they don't want any changes. From listening to Andy Strickland, there are at least some players that want this to change. Changing the rule around how LTIR works with playoffs won't change the chances of players winning a cup, that makes no sense. Only one team will win the cup a year, doesn't matter what the rules say.
In this thread, there's a narrative by some that the league doesn't want this to change, or that the players don't want it to change, or even that fans don't want this to change. But from everything we're reading and hearing, that's just not true. Fans definitely want change and at least some players and GMs want a change, whether or not that's enough, we'll have to see.