You are right George didn't deserve both it was quite the low blow.
And like Severus like Smith I think wasn't wholey undeserving of being teased. I don't mean they should tease him about his looks ect. But he cursed James every chance he got and that's according to Lupin so fare judgement I think. They were peers so it was part of growing up. Fred and George aren't picking on anyone that isn't their own size.
Remus is too gay to marry but I think she was pregnant so he did the honorable thing and married her. I think no matter what someone parents would have a hard time if their daughter married and unemployed and unemployable older man. I just love him so much that I have that bit of disconnect when others don't love him. I have to in my heart believe it wasn't the werewolf thing. More of the age doens't have two pennies to rub together thing. They were probably hoping she married Kingsley or some other "catch". Ted Tonks was also another pointless death.