It probably hasn't helped but I also think they're just knackered. It's no surprise in my view that all the English clubs are tumbling out of Europe in the last 2 weeks. Its a gruelling season if you're battling on all fronts and you don't get many easy games in the Prem.
This has been an exceptional performance from Everton from start to finish. Pretty much ensured their own survival and ended their rivals title challenge in Klopp's final season. Outstanding.