Not a fan of those paintings, but I don't see too much of a problem with what he's doing. Basically it looks like he's doing multiple takes on the same painting or idea, which is pretty common to be honest. Take a look at Van Gogh, dude painted literally hundreds of the same thing sometimes.
"Complacency is the womb of mediocrity. " -- Jason Manley
"If you always put limits on everything you do, physical or anything else, it will spread into your work and into your life. There are no limits. There are only plateaus, and you must not stay there, you must go beyond them." -- Bruce Lee