This is the hardest type of wave ridding. when you go right, you basically cannot get away from getting pulled off the wave as you described. , but in going left, you can drift the kite though. heres what i usually will do
start on the swell pointing as if you are going right on the wave. your kite will be around the "g" on your picture. then right as you begin to "drop in" kinda fade toward dropping more straight in. but you really still will have an angle going toward the right because you want to keep good tension on the lines. keep the kite super low. as you are around half way into your "drop in", snap turn your kite toward the left. let it fly left just a tiny bit, then comitt to your bottom turn following the kite. here's where the magic happens. it now will depend on a bunch of different elements to determine how drawn out your bottom turn will be: how powered your kite is, how big the waves are (basically equates to your board speed), and how well you snap turned your kite and when you initiated your bottom turn. those three things are all working either against you or with you. but your goal is to have the kite go into a perfect drift at the "e" in "left wave". if the stars are in line, your kite will just drift around that e, and you can get any ware between 1 and 3 bottom and top turns before you have to redirect your kite.(there's actually two more factors- one is the swell direction. this is super slight and you really won't notice this, but slight variations in swell direction will mess with it. - the other is how well your kite drifts. but again, it is what it is)
so now, you've been ridding down the line and your kite is getting closer and closeer to the wave like around the "L" in left. now you can eitherr redirect your kite over the top, or down loop it. To answer that, if the wave is closing out and you just want to straigten out or your kite is too close to the lip of the wave, go over the top and just run away. but if you want to try and stay on the wave, down loop it. just be super careful not to swipe it into the lip if the waves are on the big side. So now when you down loop it, you have two options. one is as it comes around, you just straighten out and run toward the beach. the other is to 360 degree loop and spin it all the way back the that "e" position. if it all works out, you'll spin the kite all the way back into a perfect drift and your set again.
i've written alot so sorry if it seems kinda rambling. also a note,this is how I wave sail. I just want my kite in a perfect drift so I'm surfing with no power in the kite at all. hope this helps.