I was once a DT farm shamer, but then I realized at that time I was also just a nomod jump farmer. Eventually, I realized that DT isn't the only way to farm and as I've gotten higher in rank I realized that everyone farms to a certain degree, it's just that they farm the skill they're best at (like me farming consistency maps/aim maps). In short, right now I think it's actually a smart way to play the game, because why would you want to get a nomod 400PP play that is either some cross-screen jumps or a 5+ minute stream map like Save Me/Through the Fire and Flames when you can just play quick DT aim maps and get the same result since, in theory, you're playing easier patterns faster. However, I will stick to saying being a one-trick is bad.
In conclusion, I think they're pretty immature caring about other's top plays when they probably can't even play the maps they're complaining about. It's your account, your top plays, play what you want, enjoy the game.