I'm thinking of changing my 5 star review of my wedding venue to a 4 star review over a rude interaction with a groundskeeper that happened 8 months after my wedding
Is that a good reason to change the review?
I think it is, it happened at the venue.
I think if the wedding itself had gone well, then you should not change your review. It has been a long time and this interaction did not reflect your wedding.
I think the guy just had a grudge against me and wanted to get their revenge on me. What a jerk.
It could also be a misunderstanding or the guy was having a bad day. I wouldn't go back and change the review over something so trivial.