I feel ya 100%. I've owned multiple houdini dogs. I currently have a tibetan mastiff mixed with bloodhound that is an escape artist. He has made himself a stench in the nostrils of my neighbors on multiple occasions. One set of neighbors near us kept picking him up and dropping our dog at the pound, costing us $40 each time to bail him out. With another neighbor, he got their much smaller dog pregnant and we ended up footing their vet bills. All in all, we had to:
1) get our dog neutered and microchipped
2) We had to humbly apologize to various sets of neighbors on multiple occasions. We exchanged cell phone #'s with the neighbors so if our dog got out, we would text them to let them know it and that we were out trying to catch him. And if he got out while I was at work, the neighbor would text us to inform us, and I would send a friend or family member to go find him. So they knew they didn't have to take matters into their own hands.
3) We put in a 7' livestock welded wire fence with a pvc pipe framed gate like this that has a top and bottom latch so it won't flex.
pvc gate I've watched a collie, a german shepherd, beagles, and now this mastiff/hound mix pop over a 4' fence like it was barely an inconvenience. I had a collie that used to bust through a 7 strand hot wire high tensile fence because his thick fur protected him from the jolts that would push a stud horse (and our goats) back. Also, before the upgrades when I kept chickens in a fence my dog would use brute strength to stretch the fencing at the gate to squeeze through. He ate a lot of chicken that way, alas.
Could try something like this?
https://www.dogproofer.com/products/houdini-curved-fence-extensions?variant=12903110836279 It's stupid pricey but maybe you could make one zip tying cheap fiberglass rods to your T posts?
We also made parts of our 7' fence using 4' sections overlapped by 2' zip-tied. We only used 7' T posts every 3 posts with 5' T posts in the center of each section cuz that's what we had on hand. I rolled some logs up against the bottom of the fence in a couple low spots so he is discouraged from going under.
Good luck!!!