If you search Flybe Delay on Twitter there are lots of comments from when they were operating. Even crew saying about delays… the name stuck for a reason.
“even the delays”
It varies on whether people chose a flight based on a plane. If someone flies the route more than once on two competitors they are likely to compare them. I know plenty of people who would then say I’m sticking with BA or Easyjet rather than the little thing Flybe took me on. Irrational yes but it happens.