I dont know if the amt of failed kicks makes a difference or jot. Just a thought.  I had a built up 250r with 235 lbs of compression and it took a while to learn how to start it.  If i gave it any more than 1/4 throttle while kicking, it would kick back so bad it would sprain my ankle.  It got worse if i had 7-8 failed kicks.
Eventually i learned to get the piston just below tdc and only blip the throttle a tiny bit and it fired in one kick every time with no kickback.