This was frustrating... I found myself talking to the screen a lot. Please pardon me for venting, now. I know it's wrong, but it's late at night, and I find myself about to do it, anyway.
First, don't be foolish -- wear some workout gloves. Or garden gloves. It's no more cheating than is all that chalk you invested in.
How do you expect to get any spinal traction, elongation, opening, etc., when you are continually contracting your lower body, while you bend your knees, etc. Raise that bar up even higher (I noticed you did it on the second day), and let your lower body hang and relax. It's called a "dead" hang, after all.
Take some time off. Muscles, tendons, and ligaments need recovery time. Did you not know this...? I'll bet if you had taken a break for 48, or even 72, hrs. after this foolhardy experiment, you would have seen some more significant gains. (I say "foolhardy" because you jumped right into doing 5 mins. (without gloves!) on day 1 -- rather than do what a more sensible person would have done, and work slowly and methodically up to that time.)
You were absolutely aggravating your old neck injury by how much hanging you were doing from the jump. You were likely overstretching an already compromised area of your body. I've done that very same thing with hangs -- because I was overly focused on "staying on schedule". That's a white-belt mistake.
Fwiw, I'm 66 and have worked my way up to, among other things, hanging from just one arm, with a weighted vest, for nearly 40 seconds. (My longest two-arm hangs are about 2 mins. longer than that.) I mix the active and passive (dead) technique into the same hang because my old, aforementioned injuries flared up with just the dead hang. I think I've been at it for nearly two yrs., now, and there's been a ton of healing for me during that time. My shoulder joints have never been stronger or more balanced.
And I apologize, again, for venting above. I hated seeing you make the kinds of mistakes that seemed designed guarantee results that were, at best, mediocre.