Absolutely not. I have enough perspective to realize that if I were a professional athlete, I would be trying to get as much in my ten years professionally as possible.
It is possible to watch the old videos and games, appreciate and respect those players for what they did, and also have no hard feelings because they left for money elsewhere.
This kind of stuff happens with normal people all the time, whether it be close school-mates who go on to other things, or friends/neighbors moving away to pursue a better job opportunity, or co-workers changing companies for a raise or a promotion.
I'm not sure what makes this year so different for some people.
Haven't we already experienced this with Bledsoe, Woody, Milloy, and Law? I still thoroughly enjoy watching the 2001 DVD, and watching those guys play well.
McGinest, Vinatieri, Givens, and Branch are pretty much the same situation, as far as I'm concerned.
The only difference is the DVD's look more dated now, since most of the current team is turned over with new guys.