Colorado could've easily avoided this outcome if the GM wasn't being shady trading him off without any notice, stifling any attempts from Carolina to come to terms with an extension before making the deal. If they do that, Rantanen likely gets them much more from another team or at least Carolina.
But the original trade is working well for Colorado, so their GM doesn't give a shit, lol.
This is why, in any profession, you always gotta put yourself first. f*** all the emotional manipulation of "we're like a family" or "you gotta put the team first", the businessmen are gonna run their business and you are just a number amongst numbers.