I describe this as fiendishly easy - what do you think?

Wow, what a pointless grid

Kind of a nasty trick but I wouldn't call it pointless (unnecessarily mean comment). I love the idea of four whole false groups, great premise to begin from. Unfortunately I couldn't get a handle on this; looked at vowels, initials, logical links- but the reveal was fair if frustrating, and technically flawless. Well played

Feel cheated of my time with this grid.