You did something very wrong. My guess it the liquid sandpaper to start with . You need to actually sand properly. If you did not remove all of the residue from that liguid sandpaper there was no adhesion with the primer so the primer did not adhere so anything put on top of it didn't either

Any idea why this method worked several tomes before with cabinets and not now?

Times*

I just ask because this was recommended by SEVERAL people who have done it with great success.

What type of paint did you use and what type of wood or material were your cabinets to start?

If this were me I would just be on the phone to a pro. I don't trust myself to paint cabinets and make them look like new. I am decent at DIY and have painted smaller scale projects like a vanity with chalk paint but an entire kitchen is way beyond my skill level. I am sorry this has happened.

No mention of degreasing, no sanding, a deglosser without neutralizing, probably a water based Kilz, and no mention of the top coat brand which means box store junk.

There’s not one *right* thing done in any of that. No fixing. Do over. Completely. Peel and sand like heck. Prime with BIN. Priming is required. Required. Sand. Prime again. 2 coats with a urethane enriched enamel like Emerald or Advanced. Or, do the professional thing and move up to a 2K poly like Milesi. The correct paint choice never ever needs, and should never have, any topcoat. That’s amateur hour mommyblogger crafty Pin stuff. Not professional work, or professional results. Professionals don’t need callbacks, or extra steps for inferior results. They do it right from the beginning, and in to the next kitchen 4 days later.

Call somebody. I don’t recommend that you attempt to remedy this yourself at this point.