Yes, maybe people have experienced the horrificness.
There is a talk from earlier this year about how they are making an noble effort to improve the thing in their next version: https://fosdem.org/2023/schedule/event/matrix20/
Discussion
Have these changes already started taking effect? I admittedly don’t have much experience at all with matrix but tried it the other day and thought the basic messaging functionality at least was fairly smooth. Far from the worst I’ve experienced haha