I felt the same way about Robotron the first time I dumped a quarter into it. My 3 men died in about 10 seconds and I was about as insulted as someone who just stepped in dog poo with their brand new, white running shoes.
It's ok though. I've rolled the machine countless times since then. Keep practicing and next thing you know you'll be kicking butt at it. Check your sensitivity as suggested earlier. That may help.