As a counter example look at privatisation of the UK rail system.

Granted, that not every experience is abyssimal, but in my experience most train riding experiences in the UK are pretty terrible.

Filthy trains with partially massive undercapacity at sky high prices. Delays, cancelled trains and you - the passenger - is just left out to dry.

Infrastructure is also problematic, like an underabundance of ticket machines, let alone ticket selling staff at stations, etc.

It's also interesting to note that Japan rail companies can keep prices reasonable by making major parts of their income via real estate.