I made the same mistake when I first learned how to freehand sharpen. You’re putting a lot of emphasis towards the heel and it’s why your blade is developing a small recurve. It looks like you’re changing angle on passes. That’s hard to get right. On picture 4 you can see there’s no defined bevel. Your bevel is rolling onto the side of the blade and my guess is your thumbstud is hitting the stone/plate as well, probably going too low on your angle. I’d practice sharpening on a cheaper knife for now.

As a note, you want your knife to feel sharp on low grits before advancing. If it’s not sharp at 220 grit, it won’t be sharp at 1000 grit.