Is Hazel affected by the number of rules you set up?
I think the Hazel ui is getting slower and slower, even saving a new rule makes the "spinning colour wheel" to appear.
On the folder that i have the most rules i have about 275 and the i have some more folders but those are not as many rules.
Would it help to unactivate some of the rules, there are probably a lot of them that are in no use at the moment.
in some earlier version of Hazel the rule would get a ! if there was something wrong with it.
(the "move to" folder was missing) but now days i dont see that, and manually open every rule to see if the move to folder is grayed out is a lot of work..