Honestly, you just get used to it. While I haven't had any bad comments on this channel, I do have a second channel that I mainly use for watching videos from my subscriptions. I did make videos on it at one point. They were terrible quality Let's Plays with a camcorder. One time, I got nearly 200 views on my third part of Super Mario Galaxy in less than a day. I was super excited until I read the comments. One guy put "You have got to be f**ing kidding me. By the way, the Japanese Text doesn't make you look cool, it makes you look like a f**ng idiot."
It should be noted that I imported my Wii from Japan so I was playing Japanese games. I didn't use the Japanese version to "look cool", I simply did it because that was all that I had.
So, you might be wondering why I took the time to write out my story of one of the worst comments that I got. Well, to put it simply, you never know how good/bad the general reaction to your videos is going to be. I'm not going to sugar coat it, it could be pretty bad. But that's not what matters. To quote what NintendoCapriSun once said on one of my Super Mario Galaxy video "You'll hear some strange things in comments sometimes; all that matters really is that you just do your own thing." You just have to keep pushing and improving yourself. You'll come to ignore the haters eventually.