That is dead meat on a stick. Get it replaced.

I tried to straighten a dented rim that was no where near that far gone and had no luck at all getting it leveled to my own standards. I tried about three times and gave up.

I'm fussy about how my wheels ride and my brakes feel. The constant pulsing while riding and more noticable pulsing while braking over the month or more of messing with it drove me nuts.

Mind you my rim was a medium depth V section and the bend went into the triangular V area. Nothing I did with the tools I have available would have gotten the kink out of that locked in box section. All I was left with was messing around with the portion that formed the tire channel. And whatever I did was not enough. As the saying goes YMMV but frankly I suspect you'll never get this rim to feel right. And certainly not without a lot of "autobody reforming" to the metal to straighten it up as much as practical.