Every Sentai series has them.
Call them what you will: grunts, footmen, underlings, push-overs..... useless?
Seems like its an ongoing trend that shows no signs of changing. The big bad monster comes in and let the grunts do the work (not to mention never once making use of the distraction they provide), only to be beaten down again and again by our heroes.
So why do we have them? Are they just there to fill the time or have they ever been useful somehow?