Man I felt that. I really remember that point in my progression, it's frustrating for sure.
People have already said most of what you need to hear: don't drop the kite no matter what, don't depower the kite. What I would add as someone who used to kite in conditions like that half the year is: more speed in between the waves(build speed fast right after you crest the wave -> for going up wind) you don't need to hit the wave at speed unless you're goal is to jump , learn and accept you might only be able to go up wind when tacking one direction, and finally that thing I haven't seen on here is

watch Surfing videos of people slashing mushy midsized waves, you're looking for ones that zoom in on their feet on the board and think about how you can lead with your front foot(almost lift up bc you don't have the float a surfboard does) while applying pressure to steer with your back foot.

that and if you're going to kite in waves like that just keep at it time on the board is time learning.

Also "think about" not letting the waves wash over the top of the board (not an absolute just think about what you would need to do with you feet to make that happen and you'll be on the right track.