There isn’t, most of the people on this thread talk crap and have no concept with how the railways are run, or know the current state of affairs of the network. The reason for most of the mismanagement is down to an ideological obsession by multiple Tory administrations to privatise everything...
Southern, Southeastern and Northern is are not exclusively DOO, but are DOO on certain sections, for good reason on certain section. Thameslink and Great Northern encounter a lot of DOO related issues.