If you are super fed and better than the other players, yes it is fine.
It doesn't feel good for the enemy team because they now have to focus the fed person or lose team fights
That is how it should be. Why focus the inting marksman when let's say 11/0 Riven is in the game?
it doesn't feel good for your own team because they never really get their moments to shine.
Why would that stop them from doing well? They can do well and still have a person on their team doing better than them.
Plus with the communities attitude towards losing a game is really disheartening. It basically boils down to "ff at 15".
That's the communities fault.
I enjoy comeback games.
This still allows for comebacks. The champions that 1v9 are also very susceptible to miss playing and getting themselves outplayed unless they are unhealthy at the time.
My problem with the game is that it doesn't feel like if I'm doing well it matters because if one person is doing really poorly the other team just auto wins. Also people don't know how to get carried which causes them to die more because they think they need to carry and they actually just lose the game for everyone else.