It is super annoying but you have to be very naive to not understand that anything that can be abused will be abused so you need to bake in countermeasures from day #1 or you might as well not bother with the launch.
A lot of the spam I got was from being sent room invites, and the room names were really nasty stuff. And their client doesnt let you mass delete invites, I tried to do it one at a time but gave up and deleted the account instead.
Their server clearly doesnt care that a single federated server was sending out thousands of invites, and there's no way to avoid the spam.
In general using matrix was always a pain in the rear for one reason or another.
