I cancelled mine last night and emailed the club to say why (well...filled in the contact form where they say they'll get back to you...zzzz)' Had our tickets since the Ardilles/Keegan season (just after we'd all left Uni and got jobs) but had been going since being kids....been with the same lads ever since so end of an era.
Currently I just feel f***ing gutted, tbh.
The 'gutted' feeling does pass eventually. But you did the right thing.
There are alternatives in local non-league where your support and cash will be gratefully received. And it allows you to rediscover why you love football. My cash and energy is headed to Croft Park, this coming season.