Would it be fair to say that every single class of train on the UK network is equally as bad as all the others?
Whilst I wouldn’t go quite this far, I would say that the UK suffers from the twin problems of overuse of multiple units (particularly diesel units) and trains being built to woeful specifications.
The latter point(s) have been done to death here and on other forums.
However the rush to give us multiple units has resulted in awful travel experiences the length and breadth of the country. I don’t write this as a ‘loco-hauled only’ enthusiast but as a regular rail user.
DMUs were originally conceived for branch line use but have become the train format of choice for long-distance operators. The trouble is they’re awful places to be when the engines are under load - perhaps tolerable in the flatlands of East Anglia but extremely unpleasant pretty much anywhere else in the UK, especially as they age.
I realise this is the old ‘fit for purpose’ moan but barely anything changes.
Leeds to Carlisle on a 158, Welsh lines on a 150, anywhere in Scotland on a 158 or 170, Waterloo to Exeter on 158s/159s, almost all Cross Country services, all Grand Central services; all wholly unacceptable but the list goes on. And will now/soon include new-build DMUs for use on longer routes.
So, for my money, classes 150 to 197 are jointly the third worst trains in the UK.
That’s because the Virgin legacy fleets will always take the gold and silver medals. It’s some going to make an EMU the most execrable train on this island with the exceptional level of competition noted above but Virgin did so with the 390, followed closely by 220s/221s (and derivatives).
Not all our trains are equally bad but most are diabolical and a couple are absolutely $h.te.