Agree 100%.
I've been saying for years there's very little hope for that program baring a miracle.
The portal helps alleviate some of this but..
New Mexico is a sparsely populated state. So it doesn't churn out a ton of FBS talent. The good talent they do produce leaves to bigger schools. So you can't really build with in state talent.
Add to it they simply haven't shown any inclination to really invest in the program. Landing Mendenhall was a step in the right direction. But not being able to find the money to counter USU shows they are only interested in winning not committed to it. Even if they matched Bronco probably still leaves, but I'm not sure how hard they tried.
At the very least Eck showed at Idaho he can rebuild/build something from nothing. Will it translate to UNM, I don't know it's a really tough job. But I think his type of resume was a good fit for UNM.