I don't think it's shameful at all. I just prefer to hold professional soccer players to a higher standard than "tries really hard". This is more of an indication on American soccer culture in general - fast running, hard working players are more valued than skillful ones. It's affecting soccer at all levels, starting in the youth ranks, and I guess reflects fan perceptions as well.
People aren't evaluating his ability to impact games, they're thanking someone for their efforts as they fucking retire. I think it's a good move on his part and good for the team at this point. If I had any faith in this organization I would say it's good to have the cap space freed up for a new option. Doesn't mean people can't be happy with his effort (the only thing he can control) and thank him for it.