Sicario2 - Tier 1 We all looked back at the summer of 2015 when things were going well post back to back FA Cup wins we didn’t sign anyone (bar Cech) and look how that turned out for Wenger. Same year we should have won the title. The current holders (Chelsea) were having a mare and a team you didn’t expect it won in the end. Sound familiar?
I don't think we can compare 2015 with where we are now. We hadn't seriously challenged for a title for around a decade at that point.
But as you allude to, the same people responsible for disappointing you this season were responsible for raising your expectations in the first place.
History may repeat itself but I don't believe it's a given.