You so very nearly had the right answer as to what the real problem is. And to help you I will give you a hint....
https://www.gov.uk/government/organisations/department-for-transport
That looked like a massive protest. I'm sure all protagonists are quaking in their boots....
Seriously though, who do they propose take over? Answers on a postcard to DfT, Whitehall, London.....
No. And this is because no matter who runs a TOC, they have to deal with the broken franchise system, and successive governments that refuse to see the railway as a public asset instead of a cash cow. That's not to say that there are not bad decisions made by TOCs, but even just a glance at these forums reveals that there are problems right across the network.
Things will only ever change for the better when the railways are run as a public service, for the public & with the necessary public funding. That doesn't necessarily mean nationalisation, but at the very least the system needs to be changed so that services & revenues are owned by the government & contracted out to the operators.