To me, and I honestly don't want to start back and forth stupidity with this, those decade records are very telling (hear me out).
As I mentioned previously, I think SOME of it has to do with open enrollment and how Moeller has drastically brought in better talent than every else. When you play them twice a year, that's almost 2 guaranteed losses for everyone, where that wasn't always the case in the decades prior. So I will admit, that tells SOME of the story (albeit, IMO, a small portion of the story).
Another thing that happened around that decade turn was the focus on specialization. Regardless of your opinions on if Elder should or should not do this, the programs that have used specialization and year-round training as their model have found more success than those that haven't. It is an important part of the success of programs like Moeller, Oak Hills, Centerville, Lakota East, Cov Cath, Cooper, and others like Turpin, LaSalle, and now St X is working towards this with their new coach.
It's one thing if Elder has made the decision to put all of their investment into football. There's not much the basketball program can do in that case. If that's a reality, it will be what it is. However, it's a much different story if the basketball program is choosing to operate that way. If the school is giving them free reign to build out the program and they are simply not doing what's necessary, that seems to a reason why we've seen such a disparity in records since open enrollment and specialization began.
All of this other nonsense about it being "unethical" or "against the spirit of the rules", or that Elder simply can't get any talent, is purely that - nonsense.