When you play poorly, the team suffers, people will be angry at the impending loss. You will get flame whether you have 5 hands, 2 hands, 1 hand, or 0 hand. Not sure what your condition has anything to do with human nature (most people will not know you have one hand unless you told them....)
Do you deserve it? Probably not. I find whenever I do badly, saying "damn, this is not one of my good games, sorry guys". I mean you DID played poorly, so taking some responsibility and apologize to the team for the impending loss is kinda justified (just for the love of god, DO NOT bring up the fact that you have one hand and try to blame it for you playing poorly while you have zero problem with your condition when you were winning in other games). It will give people absolutely zero reason to flame you or if they do, they will have no recourse to contest their punishment when they flame.