I still remember "traingate", the smear campaign that followed Jeremy Corbyn (1) and how leaked CCTV video proved him right much later (2).
(1) https://www.politico.eu/article/jeremy-corbyn-walked-past-em...
(2) https://www.thelondoneconomic.com/news/virgin-release-traing...
Yes, it's true that things were pretty grim. I remember being embarrassed when a colleague from Norway travelled with me in a filthy, worn train carriage stinking of piss :(
But IMO that doesn't excuse the lack of poor management since then. Things could be much, much better.
Sectorization was, of course, the prelude to privatization.
This is only a Wikimedia page, so if you have better evidence that contradicts it, feel free to present it. But note that it cites trustworthy sources.