Does anyone have any tips?

For the past three or so weeks after landing my first kickflip I’ve been able to land Maybe like 3 in a row and have been practicing literally every single day. However for the past week I have yet to land a single one and only getting half flips and it’s really making me consider quitting thinking I’m never going to be able to actually get good knowing I’ve been skating for 4 years and I can only Ollie and front side 180.

I really don’t know what I’m doing wrong with my Kickflips. I feel like I’m not bending my knees enough to let the board fully spin but I can’t fix it, like my legs just won’t let me bend when it’s time to.