Horses for courses. Or more appropriately phrased, courses for horses. LOL don't think you got the only raw deal out of a "how to get rich with stocks" course. $250? I can't even count the days I have lost that much trading. Okay yeah I could, but I don't keep track because it happens. $250 losses are part of the game. You learned something about taking courses, and that is that they are seldom worth the price, maybe never worth the price.
It has often been said that those who CAN, DO. Those who CAN'T, TEACH. And there is definitely some logic behind that, if not empirical data. A good trader will be trading. A lot. At least half the day, most days. When is he going to find time to put a course together, or give individual instruction or feedback? So it stands to reason that most of these instructors are not actually very good at trading, but are better at selling courses. Now I will not say all or everybody, because maybe there is someone out there who out of the goodness of his heart wants to raise the bar and create a new race of super traders. Remember, day trading in particular is for the most part a zero sum game. Wealth is not created, at least not much. Rather, wealth is transferred from bad traders to good traders. When one guy makes more money, another somewhere has to make less. And so I say altruisim in offering instruction just isn't a thing. It is all about making money. And for some, there is more money in teaching than doing, and knowing how to do is not a prerequisite for teaching. Au contraire. Truly knowing how to trade should keep one from ever spending the time to teach others. UNLESS it is to gather followers. Hey everyone, I just bought $20k shares of this stock cause I believe so strongly that it will triple before the day is out. YOU NEED TO BUY BUY BUY THIS STOCK TOO!!!! Then, a couple hours later, "Gee, I hope everyone sold their shares cause this stock is headed for China, by the shortcut." After he already sold his position naturally. A good chatroom can make the owner an awful lot of money. Disciples naturally spend a lot of time in their guru's chatroom, and pay an entry fee as well. Again, not saying EVERYONE uses such tactics but I can point to a couple that definitely do.
And you are disturbed because the guy is a horse's behind and talks rudely to you. This is the internet. Not excusing the guy, no. If it is as you say, then he definitely get's the ******* award. But you should not be overly surprised, disappointed, angry, or hurt. It's just the internet.
If your goal was to drive business away from this one particular guy, well, I don't see the point, when he is just one among many. What about all the rest?
A course will never make you a good trader. It might teach you how to become a good trader but the onus is still on the individual to actually become that good trader by putting best practices into practice. The same basic information is parroted in a dozen books out there. On trading in general, and on specific areas or disciplines. Grab a couple from Amazon and read them carefully with your trusty sticky notes and highlighter close at hand, and then read them again, and one more time just to be sure, then trade a bit and read them one more time. You will have learned more than any course can teach you. And you didn't have to get solidly cussed and badmouthed in the process.
Anger. Revenge. I am sensing this from your opening post in this thread. Counterproductive, and not really all that satisfying, either, I bet.