Nobody wants to land in Bristol at 21:30 on a Wednesday night!
People returning home to Bristol might.
When easyJet used to operate 3 x daily (4 x daily for a while) I used the service several times.
Taking one year as an example, my 2006 timetable shows 3 x daily Monday to Friday and Sunday with one rotation on Saturdays, with all rotations operated by NCL-based aircraft.
There were departures from NCL at 0700, 1600 and 1925 with the return services getting back into NCL at 0935, 1830 and 2155.
I agree about the disappointing timings and frequencies of the current timetable with midweek particularly poorly served (this timetable has been in place now for a year or two and next winter seems no better) but one has to accept that easyJet knows what it's doing and has decided that better options lie in other directions.