Noob to the forum spilling his 2 cents worth.
I must be one of the lucky few that putting never really was a problem for me. Still, I do get the yips from time to time and can not hit a basket from 10 feet away, and confidence goes to zero.
Having a good form and routine is essential if one wants to take it to the next level of putting, but form doesn't put the disc in the basket, your concentration does.
I was practicing from about 35-40 foot out and making about 2/5, which isn't great, but still I am making them, when all of a sudden I just fell apart. I must have missed about 25 in a row. I changed putters, moved to a Wizard, which actually I find to be an amazing putter, I changed form and styles, even got a great help from a Cameron Todd video explaining his putting grip, that works great for my putting and my putter approach shots. Still, what I know now is I got tired, had been practicing for a while, and my concentration went elsewhere.
A few weeks later, I was tired, mid-round, and missed a 10 foot uphill birdie putt. I was stunned, I mean I wiffed it. My confidence went to pieces, and I couldn't drop anything.
When I realized it was my concentration, I was able to overcome the yips, and that fear when putting after you have missed a few and are desperate to make one. It is the only way I have found to overcome that feeling during a round, you simply have to write it off to a lack of concentration.
Simply zero in on the chain link, or whatever target, then beat that target with your disc like a red headed step child. If your concentration is good, you could putt with a metal trash can lid, and be consistent and good.
Visually focus on the target, smaller the better, like 1 chain link.
Mentally visualize hitting the target.
You may not always make it, but if you really focus and concentrate, I bet it will be close.
*when practicing, you can focus on your grip, balance, delivery, etc. But when you are in game mode, the setup needs to be automatic, while you only focus on your target.