To be fair, this is often not the people's posting fault. As someone who also goes searching, there are a bunch of tags that mean reader-insert that should be synned and aren't. Or are freeform and not canon tags? I think? Which makes them more difficult to filter for. I also think excluding the "reader" tag should also exclude anything in the relationships too because...duh. This should be the case for every relationship tag if you filter out for a particular character.