"Similarly, there is a wealth of difference between running a service efficiently - de-staffing stations, pay trains, well considered track rationalisations, and running a service down, i.e running the trains at pointless times, reducing the time between first and last trains to make them unusable for a day trip, running at times that destroy meaningfull connections.
There is a wealth of difference, but this 'running the service down' was not really a deliberate act; it often had its origins in the bus competition of the 20s/30s (passengers deserted local/branch trains and the railway cut the service accordingly); followed by wartime curtailments, then coal shortages post war, then economy drives in the later 50s (due to the urgency of the situation and the size of the job, often these curtailments were merely removing services from timetables rather than recasting, leaving long gaps). Running trains at 'pointless' [to whom?] times, but I guess that some trains ran at times convenient for Royal Mail connections, parcels traffic, or connecting with main line trains, which did not make sense to the local travel market etc, or merely because it was too expensive to run at other times . I should think that many lines were realised to be no-hopers already, so the timetable became a 'minimum to get away with, with minimum costs. ' [The Selby-Market Weighton-Driffield line timetable at closure would be an example of this, although still performing some purpose]. With lots of criss-crossing lines, all with relatively (to today) infrequent services, would have made comprehensive meaningful connections well nigh impossible.
Even introduction of Diesel Railcars and more frequent services did not help many lines (Buckingham-Banbury, Bristol Suburban services, Eastern Valleys for instance) but some it did and these are still with us. Just because some lines closed still steam operated does not necessarily mean that a trick was missed with no conversion to m.u. trains.
