That's some shady bs. No one I know flew more than 101 - 102 hours to get their license so how exactly is an instructor purposely making a student look bad generating more hours. In fact I found the opposite, the instructors wanted you to excel because the flying got more fun. Think less circuits more confined space, mountain, helipad. Instructors will manipulate the controls your whole career its kind of their job get used to it.
You get out of Chinook what you are willing to put in. When I was there, those who were keen were treated well. Those who wanted a license cuz it was cool... they got a license. The problem with chinook is not low quality instructors, it is low quality students.