North - let me come back again...
You'll note I used the made-up term "very regional" airport. Its a nonsense term and maybe better expressed as a "minor regional". but my point is DTV is, was and always will be different to a major regional. NCL is a big city. Leeds is a big city with a financial district. You can add other regionals like BHX, MAN, EDI, GLA etc to that list.
My question about comparisons was to other "minor regional" airports. Can anyone come back to me with evidence of a minor regional airport seeing material success in the three areas I raised? If you can, and that airport is living in a region that has the same economic and social climate that DTV is....I'll shut up and get my coat now.
If you want to complain that DTV is not NCL or LBA and isn't seeing anything like the traffic that they are...then whilst I'll agree with your facts, I think the complaint you raise against Peel would likely be made against any other owner of DTV. "Teesside" and "Newcastle or Leeds" are totally different animals.
Compare apples with apples....