Leg,
There will always, I guess, be people who disagree with what anyone says; &, I certainly do with what you say about the Dash 8.
I have flown on them many times incl. EGJJ to EGPH (pretty long distance for a Dash 8) & have never found them to be "dirty,smelly,cramped & noisy".
Well, maybe a little cramped - as a 6 footer.
So, there you go !