Actually the SEC usually does decently well in March. Overall the league usually at least plays to their seed level, unlike the Big 10 that always gets great seeds that go down early.
B1G has teams like Illinois that have made the Title Game. Put the leagues in comparison on # of Final Fours, Sweet 16s, etc. They kill the SEC.
Half of the SEC's march success is Kentucky and only Kentucky.
It is actually quite pathetic that schools like Alabama, Tennessee, Vandy, Ole Miss, etc. with resources have NEVER made Final Fours but Butler has made multiple, George Mason has, FGCU has, Loyola has and more, etc.
There is no reason the SEC shouldn't have teams in contention with Final Four and making Elite 8s every year.