Chessington deserve the complaints they are getting.
It's summer and packed, they should be running at full capacity!
Get Fury on 8 - I don't understand why they won't use 8 cars on packed days.
As for Vampire, get proper staff/train staff properly and run the thing at a decent capacity!
2 hours and 40 minutes for Vampire is outrageous and people have a right to complain about that. The fact that other queues were short(ish) shows how badly the ride is being run.
They need to pull themselves together, because at the moment that really do deserve the complaints they are getting.
And with Rameses and Runaway Train down they should be striving to improve throughput on other attractions to make up for it, not running them at bare minimum!
This really makes you wonder what goes through the heads of some people!