Although I no longer trust a lot in new projects, but your words are correct in general, no project can succeed immediately, but rather needs time to complete the worksheet, discover mistakes and work to fix them, and also until it gains popularity among people.
Unfortunately, most projects end after the coin is listed in one of the exchanges, and most of the time the project is not followed up by the project team, so the project fails. Successful projects need continuous follow-up and require a lot of time and work.