This thread is like watching a group of monkeys try to hump a football.
OP, you have fallen out of the 'backseat' and are now in the trunk. Climb into the drivers seat. How do you do that? Get your hips over your feet or your feet under your hips, whatever terminology works for you. Get some contact on the boot tongue of your boot with the front of your shin, eliminate contact with the back of the boot with the back of your leg. Bring your pelvis forward as you make that shin/tongue contact. Seriously, bring your hips forward. More. Even a bit more. Don't squat.
Folks try to 'get forward' by bending their knees and getting their chest/shoulders forward, this is almost always accompanied by the corresponding move of the hips/pelvis/center of mass travelling back and down. Don't do this. Ever. (absolutes are fun! OK, if you are skiing in a tuck it's good form. All of the rest of the time on snow, don't do this.)
We don't need video and his boot fit is almost definitely too big... so what, it's not the real problem. You need a visual of the OP skiing? (Sorry OP, I'm trying to help, honest) imagine taking a dump, think about the process of mounting the 'throne', OP is somewhere between 1/2 and 3/4 of the way down. How can we be sure? He has to stop every few minutes due to toe pain. This isn't a mystery... and it's still just a symptom, not the whole problem.
The root problem is most likely fear, OP is leaning back, the back of his leg and the back of his boot are working together to jam his toes into the front of the boot. Good skiing involves moving out and down the hill as we play with gravity, all of our natural instincts scream at us to move back and into the hill for safety as we struggle to resist gravity. Skiing is a sport where our natural survival instincts will get us hurt. OP is letting instinct overcome technique. Practice good technique on non-threatening terrain until it becomes natural or else instinct will win every time. And get your hips forward. More. That's a little better.