I grew up with a kid who didn’t distinguish himself in much. He was an OK student, a mediocre athlete and was kind of funny looking. Since he didn’t have a lot of a positive nature to offer the world, he started to do things like wear funny looking clothes and taunt known bullies. He seemed to enjoy being teased about his appearance or getting punched for making a smart remark to a easily angered jock. I guess he decided that negative attention was better than no attention at all, and that being annoying was easier than putting in the hard work needed to excel at something.
The difference between that kid and Tucker Carlson is that the former grew up and made something of himself, and the latter founded the Daily Caller, bought keitholbermann.com, and decided it was really funny to send out fake emails as Olbermann.