Because Carnage is just flashy loudness, a poorly handled limited use character who HAS been overused and wore out his welcome by being used in stories that generally made little use of this two-dimensional character, who's greatest achievement will always be the sucktacular Maximum Carnage bs, while Bullseye has actually done stuff in his career, notable stuff, and has been used very well in stories. Both are crazy sociopaths, but one results in good stories and the other is just a poor man's Venom wrapped around a poor man's Joker.
I like Bulls-Hawk-Eye.
Also, that rant wasn't me flaring at you lost&forgotten, I'm just becoming a anti-fan of that character, when I used to like Carnage. There's history there that brought up some anger, so I hope you don't think my post was to tear into you.