New Update messed up my game
You’ll definitely need a LOT more information in this topic for it to be of any use whatsoever.
What doesn’t work? Do you always not get XP? XP from what? Monsters? Events? Anything?
As for lag spikes, that’s a completely different issue that’s really complicated and could be on either side of the game, so let’s work on the vague ‘things not working’ and ‘not getting exp’ part first.
Also, I’d highly suggest submitting a report to Anet if you are, in fact, not getting exp for anything you do.