"Why people does not join the community and start to help instead discuss about all is bad?"
You need to ask, "why is elementary OS able to gain so much support and we cannot?" Then you need to go around and ask yourself why. The short answer is that every developer here is apathetic and has low personal standards, not even caring if users are having a hard time, like the person who started the "Haiku do you have any hope" thread. That guy was struggling and could have been a supporter, but you all drove him away. Really sad.
I bet that doesn't happen at elementary OS. I bet they try to help that guy out specifically, empathize with him that there are problems. That is why they have lots of active support.
PulkoMandy, for example, doesn't care if users of Haiku are having a bad time, as long as he is happy. He doesn't listen to users. As long as he is happy with his own machine, it is just fine and other people are complainers. But that is wrong and selfish. Other people are having problems. All of the devs seem to be like this. Kind of lazy and apathetic, then hostile when problems are pointed out.
Elementary OS has 19.5K followers on their Twitter account and they are a Linux distro. Go take a look at them. They have over 30 people working on it enthusiastically. Why don't you ask why Haiku doesn't have this and they do? You need to ask questions that are not fun to answer about yourself and your organization. Are people here any good as members of an organization? They get into fights with me and I would work on the project. Then they call me a troll.
Currently, no one on this project, be it Kapix, PulkoMandy, Humdinger, wants to be known as the visible face of the project. This is a problem. They try to own it as some kind of organizational trait of Haiku, but that is a self-deceiving story. Why does elementary OS not have any of these problems. Why are they not lacking in manpower?
This is what is so wrong with this project, that it is fragmented and everyone feels entitled to people's work before providing an inviting environment for them to help out. You need to provide an inviting environment for people to help.
There is nothing about Haiku that feels like it is worth contributing to because there is no person of contact and the devs here do not care whether they are cohesive and they also do not care if supporters are retained or offended. It looks to me like this project has become degenerate.