First of comparing art is never productive and a terrible habit.
Everyone is unique and comparisons are ultimately unfair to yourself.
We never judge pixelart on content/style/appearance. This is personal and unique and beyond judgement (or at least, we try to, unless its B.O.B.s pixel which are total crap.)

We judge all pixelart on established pixelart techniques alone. Your man was zoomed, inspected and analized before sending back. The comparison you make is terribly unfair because while it may 'look' simple, that art you show is 'well pixeled'. The lines are clean, the colors are used minimally and with enough level of precision.
Your piece is cartoony (we don't care about that) and the nudity in this case means nothing since there is no vulgarity which is what we mean by 'pron' when we send something back for that reason.
The problem with your character is ALL about technique. Most troblesome is that you have semi-transparent pixels all over the place. A complete and totally huge color palette most of which do not 'add' anything. The line quality is sloppy and for something this small, inexcusable.




I truly hope you don't find this as a personal attack in any way. Hopefully, you will see that the comparison you made is unfair to Cone's pixel.

You can express yourself in whatever way you desire and it is encouraged that you do so. You must however make pixelart using the right tools and techniques which include many and don't forget file output too, the cause of the semi-transparent pixels.