On autotune issue: Why do आप think many people are targeting BTR for being गाना in autotune?

I have no idea if the boys actually autotune. Maybe they do and I don't notice it. However, since I'm not 100% sure if they do so, I'm not going to say that they use auto tune.

Well, assuming they do use autotune, a primary reason why people might attack them is because the दिखाना is about four talented hockey players, and people might find it strange that they use autotune, because that would signalise that the boys aren't that perfect of a singer. Nickelodeon promotes Big Time Rush (the real boys I mean now) as a चोटी, शीर्ष act and people might not like the fact that they use autotune.

This is all speculation, though.

Coming to your सेकंड question; It's no secret that about 90% of today's artist autotune. It's the कड़वा truth. Many artists who are currently on the charts can't even sing. Their voices might sound "perfect" on the record but the ugly truth comes out when they perform live with no playback. Of course, there are still some musicians who don't use autotune at all, but they are only one in a million.