What makes a bad channel?

[BillyVlogsTV]

This is a weird question that came into my head so i just wanted to go ahead and ask it. Can anyone give me there thoughts on what makes a bad channel. What makes you not want to watch a channels video and even go as far to unsubscribing them if anyone has ever felt that before?

Bad crappy video quality and bad audio and amateurish looking channel art(banner, video thumbnails etc) are the main ones for me that makes a bad YouTube channel!