Attempting Repanse legendary/veryhard, having trouble with cavarly control. any advice?

Hello

I'm currently attempting repanse vortex on legendary/very hard

but I'm having trouble with cavalry control.

I've always sucked at cavalry control which is why I stuck with melee heavy factions like lizardmen and green skins/ chaos

What I'm having trouble with is, when I charge the cavalry, few models would get stuck among the enemy which drags down the entire unit card.

For my life, I don't get why individuals on horses cannot push thru circle of skeletons

literally just crawling until they die

any advice what I can do besides git gud?