I find win farming the most unenjoyable thing about the game; it's just not fun to me. However, the people mentioned (Miauw and Shinte) can still win consistently even without win farming; playing longer games. Of course, it's more difficult that way and takes longer, so therefore the risk and pressure of losing is greater, so it obviously will be less consistent, as it would with anyone of any skill level, in comparison to playing shorter farm maps. They're on the leaderboard for a reason, and tried to get there. I mean, it's just what they found entertaining and enjoyable. Nolifing doesn't really matter if you enjoy it, and if you're playing this game you don't really have a life anyway.
They mostly only get negative feedback for being on the leaderboards, since people feel the need to target which just shows their lack of life as well. Shinte's like one of the most humble and nice people on the server (other than staff and people who want to be staff because they have to be) but he still receives backlash and gets targeted simply because he's a high level player who has a lot of wins, as do the other top players. People take the game more seriously than he does as well as the people on the leaderboard because they target.
They got to the leaderboards and held their place while enjoying the game, so what's the point in being negative about it? They're obviously the most fitting people to be there, because they had fun doing it, which is more important than the wins. When they play with friends they win more, but they also enjoy it more, so it kind of works hand in hand. If you win farm simply for recognition and stats, then it's not respectable. But, if you enjoy doing it, then it's respectable. If nothing else, at least they're good at the game ¯\_(ツ)_/¯