This is definitely a topic that comes up a lot when I read through a roleplay that I am looking to join. I tend to put a lot of effort into creating an interesting character and often times it feels like the character isn't given justice before before sent back to the vault. There have been many times I become immensely invested and either the other players lose interest or the GM does and each time I feel a sense of regret and anger toward the roleplay in general. I think they are warranted feelings and difficult to handle because many times the people who are the most hurt aren't prepared themselves to be a GM and protect the game. It is totally understandable for someone to become hurt and upset, but it is the sad reality that comes with the hobby. I have completed Roleplays before and there really is no greater feeling than putting "The End" as the final post and closing the chapter for those characters.