Two reasons mate.
Ken Beamish and his style of football. For me he is still the worst manager I have seen at Swindon, other than possibly Sheridan.
Beamish was a Div 4 clogger of a player, never really played higher than Div 3 and only knew the hoofball style of football, he bagged a goal every 3 games in a 650 game career though.
He arrived the previous season, took his coaching badges when appointed and was assistant to Trollope, when Trollope was sacked Beamish stepped up to the manager position.
To say Beamish was a limited player and coach was an understatement, he carried over his playing style to being a manager and we played awful long ball football, pretty much for the first time in Swindons long history we had a manager who prefered kick and run rather than footballing quality, hence the huge drop in attendances that season to their lowest ever.
Chatted to a bloke in Lanzarote a few years back..
Ken Beamish brother...
I tried to change the subject.
Apparently Ken did a load of stuff with Blackburn Rovers.