you're not being too critical at all. this player has been told many times, even once on this comm, that they are playing darkleer in a way that doesn't seem fit for the homestuck universe or an adult troll. the mun sexualizes him to an uncomfortable point and basically plays out darkleer/summoner and will spew as much bizarre headcanon as she can to justify it.

if you want to write that crit I definitely recommend it, but I wouldn't expect to see much change. not trying to discourage you or anything, this is just my opinion on what I've seen.