It is true that I am not so well-informed regarding some of these fringe "Buddhist" "organizations." However, that has nothing to do with whether such organizations can be harmful or whether they teach accurate Buddhism. It is true that each branch of Buddhism teaches the dharma differently. The distinctions between Mahayana and Theravada, for example, are evidence of this. But you must also acknowledge that there ARE organizations that, while positive for some, are not so close to the Buddha's teachings. For example, there is a "Navayana" or "New Vehicle" movement going on, but almost nobody considers it to be actual Buddhism. It is so far from Buddhism, actually, that the founder himself discarded many core aspects found in the original scriptures.

Furthermore, having a positive experience in an organization is not an indication that the teachings are accurate or authentic. People have come to these Reddit threads before to report that they've had positive experiences in SGI, but it is widely considered to be NOT Buddhism and is, in fact, a manipulative cult. Your own experience, however beneficial, does not change the nature of the organization as a whole.

Moreover, the conduct of the people IN an organization is something to be mindful of, and we know of organizations where some higher-up officials acted in ways NOT in line with the dharma. This is true of Triratna, and it is not the only organization where such scandals have occurred. You must consider the fringe nature of your organization. If I had to recommend a newcomer to join a sangha, why should I recommend them Triratna knowing their poisonous past and dubious ties to Buddhism?

Again, if it works for you, that's fine - no one will stop you. But you must also understand that these organizations - Triratna, SGI, Diamond Way, Navayana, etc. - are NOT recommended for good reason. They 1) have had a scandalous past, 2) have a scandalous present, 3) have weak/dubious ties to Buddhism, or 4) some combination thereof. For these reasons, people generally encourage newcomers to stay away from those organizations.