You're definitely not a troll for making a fair point on a tweet of his that was very generalising and devoid of nuance. Just because one person succeeds without a mentor doesn't mean everyone can.

Tom does tend to deal in absolutes which isn't the best policy in life. If that tweet regarding trolls was aimed at you, then he must have very thin skin. I thought you were making fair points against his argument, which he should expect when he makes a comment such as that on social media.