I’m really sorry to hear that.
I would like to thank you firstly for giving The Events Calendar a shot and also for bearing with us while we looked into this and other relates issues that cropped up along the way; we are in fact spending time over the next few release cycles investigating ways to alleviate potential performance concerns – as you can appreciate though this is, in reality, not a piece of work we can rush.
Thank you also for posting your last update: I’ll certainly feed that back and I do hope the end result will be a set of future improvements sufficiently compelling to encourage you to take up and use The Events Calendar and Events Calendar PRO once again.