Let's say we have a custom object called 'Business Reviews' (BRs) which has a lookup (Consultant__c) to User.
Now would like to have a [lightning or classic] report that can show all users that were created in the >=4 months ago that have <= 2 BRs. Any other users have to be filtered out from the report. There isn't a Master-Detail reln between them so I can't use roll-up fields.
I tried a few things (group summary field, row formula, cross filter, joined report, new custom report type) but was not able to do this nicely.