This artist has completely stolen artwork from another living, working artist. There is plenty of evidence that all of this artist’s work is essentially a soup of other artist’s work as well.
It shouldn’t need to be said, but it is not acceptable to pilfer other artists’ works for your own gain. It’s not “design”, despite what some amateurs may have you believe. If two designers accidentally grab the same stock photography through legal means, that is a minor “oops!”. It’s a little bit of dirt on the chin for your portfolio, but nothing will be harmed other than the egos of the two artists picking the same stock photo for their work.
This, however, is just theft.