i know how it feels, but you have to take the critism and learn from it. make sure the next video you make is better. rewatch your videos and see what you did wrong... does it look like you did everything you could've done to it... it cannot be fixed because it's perfect? if you don't think you could've done anything else to it to make it better, then think about what people are saying about the video and see if you can see the same things... and if you think there was work that could've been done to it, figure out whats wrong... "do i need to sync this better?" "the video quality isn't all that great, i should fix that"... then take those flaws and make sure you don't repeat it in your next video.
anyway, i hope that made sense and good luck with any future videos

Pwolf