4 pane comic of dolan on the left and spooderman on the right
pane 1 (dolan): cum join opensurce cummunity!
pane 2 (spooderman): shure! how joyn?
pane 3 (dolan): Here discord! (with discord logo)
pane 4 (spooderman with tears in eyes): y u do dis?
Matrix clients are slow and clunky because the protocol is heavy and overloaded. Upcoming sliding-sync feature will make them a bit more responsive.
Talking about specific clients, my favorite is Fractal. It's still missing some features though (like spaces). But it's getting updated fast.