I agree with you that there are other better systems out there. The NCAA didn't want to use one of them because they wanted their system to be their system, not someone else's.
But two things. First of all, Pomeroy's rankings are one of the ones on the team sheets. So they do use that, to at least some extent.
And secondly, if you are bitching because our NET is currently 55 and that's obviously way too low, it's interesting that the system you would rather they use currently has us at 61. There is no way North Carolina should be higher than us in the NET at 44, but Pomeroy has them at 36. It's ridiculous that the NET has the Hoopies, who are a lower level Big 12 team, ranked 20, but Pomeroy has them 14. It's pretty unlikely that any system is going to give you results that you look at and say, hey, that looks not kind of right, but exactly right.