A report from consultants Credo, in association with the Campaign for Better Transport, claims there are "huge disparities" in the quality of train services in different regions of Britain.
In Wales they're less well-used, less accessible and have low satisfaction levels.
A spokesman for the Rail Delivery Group, which speaks on behalf of the rail industry, said:
"While there is always room for improvement, rail passengers are travelling on services that are unrecognisably better when compared to 15 years ago".
More top news
Scams can have a devastating effect on people's lives. Here are some tips from Citizens Advice on how to spot a scam.
There have been at least 400 telephone scams reported in Wales between last November and March this year, according to Action Fraud Wales.
Guide Dogs Cymru says 54% of drivers admit to parking on the pavement without thinking of the danger they pose to people with sight loss.