Definitely, considering some have no clue what they are doing and think it is fun to just run troops into the ground.
Personally, I would refrain from using the word "worse" towards this particular individual, since his experience as a fitness instructor is second to none. He also happens to own and operate a very successful fitness business as his civilian occupation (those of you taking 32CBG PLQ in the past 3 years should have encountered him and some of his staff).
In my experience, the only instructor whose PT was tougher, was a certain R22R WO with a nickname "TP"