I want to say that that sounds like a good idea, and sure, it might even fit your character, but I cannot help but to feel like you might be considering doing it out of a petty sense of warranted passive-aggressiveness, which isn't going to be productive for anyone involved. It won't make the game fun for you, it'll annoy the other players and bore them, and it'll frustrate the GM. Nobody will be happy, and you'll all hate eachother.
If that's what you're thinking, then you should just fuck off, out of the group, because the GM might be shit, but you're also being a shitter, and in a way, you deserve eachother.
That said, however, it's not inapproproate for the character, but if that is the reasoning - genuinely - then you might want to consider simply retiring the character and turn them into an NPC, and possibly just start over, with the new assumptions and changes your GM suddenly instituted in mind.
Either way, you need to talk to your GM. If I remember correctly, he came up with unexpected changes to the game meta and the assumptions within the game world, effectively fucking you over, which was really fucking uncool and not OK. It might be best for *all* of you to just start over, but it's important that he knows not to do that shit.
I also can't help but to think that it would've been better if your character had died too, because player character death is final in a way losing an arm and two friends isn't, and people that bitch about losing characters are fags.