Having a hard life (If that's even true) is no excuse for acting like a child.
Maining Roy is a depressing prospect. He has no gimmicks that he can exploit against players that don't know the MU like most other low tiers. If you know the Marth MU you know the Roy MU. Roy has absolutely no advantages over Marth.
Roy is a bad character, there's no getting around it. He's combo food, he dies extremely early, his own combo game is nearly non-existent, his neutral options are not only limited they're lackluster at best, he's extremely punishable, his recovery is worse than Marth's (Whose own recovery is questionable as it stands), he's extremely easy to gimp as a result of his bad recovery, do I need to go on?
If you want to play a tournament viable Roy then you'd be better off playing Project M or Smash 4. If you want to main Roy in Melee nobody is going to stop you, just understand that in doing so you are setting yourself up for failure.