Ok, so let me ask. If you go to https://sampson.codes/brave/ads/my_region/ do you see a lot of campaigns available? Also, if you check under OSes for the campaigns, is your OS being target much by campaigns?
Second thing I’ll suggest is you also kind of run through and check settings I talk about at PSA: Current FAQ - #21 by Saoiray to see if making adjustments there might help.