I enjoy a good troll as much as the next guy, but
1) You have to get to the SB to lose it.
2) Not all teams have been in the league for the same amount of time, and thus haven't had the same number of opportunities to lose.
3) Win% in the SB is more relevant - The Pats being 50% is to be expected, the Vikings and (poor) Bills being 0/4 for 0% is way worse.
TL/DR - The Vikings* with a 0% SB win rate and existing for all SB seasons is the worst team in the league, and piss off with your revisionist Patriots bullshit.
* Yes, that also applies to the Bills, but I like them so I'm arbitrarily not including them.