I completely empathize with this and I wanted to make a post so I could commiserate with @track_rat, maybe bump this thread for an update, and to share my story so that hopefully he won't feel so alone.
I attempted a necklift in late 2022 and ultimately it seems like the operation "failed", or at least I don't look any different. This left a very large linear incision scar in my beard where my hair won't grow anymore. It's very embarrassing and even growing out my beard barely hides it. I'm looking into a beard transplant myself, but just like what track_rat said, I'm a bit gunshy after the ordeal. So I completely understand how much this can push you into a poor emotional state. All we can do is keep pushing forward and try to make the best decisions with what we've got.
Hopefully track_rat could offer an update eventually, but I'd also be curious to hear about his experience with Dr. K. I'm interested in working with him on my case and I hope he offered you a lot of help with your case too.