Andzei, you are really close but it seems that you just need more air. If I remember right you don't ride behind a wakeboard boat and the small wake may be the problem. So unless you can get the wake bigger or ride with a longer rope to get more time you may keep crashing.
Looks sick and close you are landing far in the flats, maybe try a slightly longer line and go wake to wake? not tried a 7 yet but this has inspired me to try.
andzei, i can't do 7s, but it seems to me you could wait just a bit longer. it looks like you're killing some of your height by initiating the spin too early. if you could wait until you've entirely left the wake i think that would give you just that extra you need, because you're not far from it.
Cut harder. Stand up tall at the wake. Get your spinning down good. Get your 5's stompin so that you are so use to handle passes its like takin a dump. Then the rotation will come.