The TV companies pick the games that will attract the most viewers. Liverpool and Man U reserves will draw literally several times more viewers than any of the more entertaining fixtures you listed, which means the advertising rates are worth more. It stinks but that’s all it is, and is all it will be for years to come judging by recent comments.
They’re all too stupid and lazy (as well as too beholden to Murdoch) to figure out that putting all fixtures in one place at the same time is worth more in potential commercial revenue than any fixture they could ever stick on the box in isolation, let alone the actual subscription fees. People pay £30+ per month just for Sky Sports and have to put up with insane amounts of advertising - they’re taking an ad break every few minutes while covering matches. If football moved to some sort of Netflix style service then they don’t have to scrap advertising and sponsorship, it doesn’t need to be ad free, they merely consolidate and streamline it. Charging people less than the amount they pay for a Sky subscription to see only a handful of games in return for unlimited fixture choice, with the ability to syndicate advertising to every single person watching any English football game at the exact same time, would create some of the most valuable advertising spots on earth.