Its not the paint. It’s the substrate. That’s why MDF is a FAR better substrate for paint. Plywood delaminates and ripples. Which is what you have going on. Zero that can be done once that happens other than replace with better quality cabinets.

You possibly can cut some 1/4” MDF panels to glue over that, but then you’d need to make sure you’re using the right paint and processes to not create issues with it. No waterborne primers should be used. Same as the cabinets shouldn't have had waterborne primers used.

​I would like to add that the polycrylic glazing finish we used after paint made the problem worse. After observing this issue, we decided not to glaze the rest of the cabinet doors, and as expected the end result is much better, and the imperfections are almost invisible. My recommendation is that unless you are a professional, don't glaze because glazing will bring out the underlying imperfections. I found this quote to be very interesting about the purpose of glazing, "Glazing helps make shadows where they may not exist with light alone. Adding some less dramatic glazing gives your details a subtle pop so nobody misses these little pieces of the design." Unfortunately, in our case, we needed no shadows nor details to show up.