Alright, so you confirm that is true. Let's go through it, from bottom to top.
1. We don't know why he does it
This is true, but does not make it inherently suspicious. After all, you don't know why I am posting right now and I don't know why you are posting right now. We are all equally unknown and suspicious, or not suspicious depending on your outlookk
2. He's doing it out of his own gain
This is an accusation. You need substantial evidence for this, such as a proof of what gain he got and how he obtained it. However, this is neither wrong nor illegal: what you need to do is prove someone LOST.
I don't care if HappyDays gains something, as long as other people do not lose something due to it. Why should you? His gain without your loss is not harmful.
3. That is how humans are
No, humans are very obviously able to put aside their own gain for the gain of others or for society as a whole. If not possible, then society as a whole would not function. While people are more than capable of fucking others over for their own gain, they are quite clearly able to do the opposite as well.
I'm going to simply say this one is dismissed. Altruism has a biological basis and we see altruism in the world all the time. Pretty obviously wrong.
Moving on to your claims about HappyDays in specific:
1. HappyDays is a deceiver
This one would need evidence. Even if HappyDays has slaves, has friends he controls as slaves, or blackmails people, this would not necessarily mean HappyDays is a deceiver.
This has no evidence and can therefore be dismissed without evidence
2. HappyDays has slaves or friends whom believe he is their friend but he is actually their master
This seems trivial to prove: if we had even a single well established person who was friends with HappyDays and then was not friends with HappyDays and substantiated your claims, this would be sufficient evidence
Do you? If so, please provide it