a bit dull
It's hardly "Stickman F**kups" since they're not really f**king up anything. By the title, I expected bloopers of some sort, but all the deaths are intentional. F**kups in this case would be trying to kill the other guy and failing or having things backfire.
You have alot there, but it's not well-animated. The pacing on everything was off or too slow. In the golf club one, it looked like the guy just held the golf club to the other's head and his head came off.
With stickmen, since the art is so simple, you need to be really good at animating to make things interesting.