It seems like the exclusion condition here is not effective, what could be the reason?
I've set the conversion metric to be unique users, however, the users who have done the exclusion event still counted as converted.
The “Exclude users who did” feature only excludes users between specific steps in the funnel, not from the entire funnel. If a user performs the excluded event after completing all the funnel steps, they will still be counted as converted.
If you want to exclude users who did a particular event at any point, use a cohort filter instead.