Only the poor and ignorant worship this "God", that you speak of because that is the purpose it was invented for, as a tool of control by those who have knowledge. You see, in every society and civilization dating back thousands of years it has always been the same thing.
You have an elite class of people with knowledge and understanding who use their knowledge to rule over the ignorant. The knowledge they possess makes them invent and create things which they use to control the masses. The ignorant peoples they rule over are fascinated by their inventions and attribute them to something higher because they themselves didn't have the sense to invent them.
The elite use this ignorance against the masses by making up elaborate stories of supernatural powers and that the knowledge they possess came from the "gods", above. For example, if you had the knowledge of solar eclipses thousands of years ago but the average person didn't and you knew when they would occur, you could deceive them into believing that "God" or whatever the deity was is going to block out the Sun or the great light or whatever.
"God" was created as a means for the knowledgeable and intelligent to have control over and rule over the ignorant. This is why kings ruled over people through "divine right", using hidden knowledge they have to rule over the ignorant masses who didn't. The kings ruled how they wished, enslaved people, treated them badly and did as they pleased, all in the name of an imaginary "good and benevolent God". This "God", doesn't come to the aid of the people and leaves them to the mercy of the king it elected because I guess it's to busy to help the "poor and weak".
"God" is a delusion, a fantasy we created to outsource our personal power to something else because for thousands of years the masses of us couldn't help ourselves. This delusion continues because the masses of the world still choose to remain in ignorance while a few elite people with vast knowledge wield unfathomable power over them. The masses always believing that "God" will "save them", do nothing to bring change while the elite class take advantage of them, because they believe "God", will help them. And this is why things are the way they are, the "poor and weak" believing that an all powerful and benevolent "God" will come to save them from the powerful!
Your idea that God is only talking to people when the Bible was written and not now is completely false. God always talks to us if you talk to him as well (prayer). And correct me if im wrong but did you not also say you didn’t know how these writers knew what to write. God told them what to write. You might be familiar with the painting from the early 17th century called “Saint Matthew and The Angel”. It depicts the angel writing for Saint Matthew, or the angel grabbing and writing with Saint Matthews hand. This was then changed to the Angel just telling Matthew what to say because, the earlier painting some Catholics thought that it created the idea of God sending Angels and forcing people to do stuff for Him. Now it just has the Angel “Whispering into Matthews ear”. So yes God was technically the author but he just had people write it down for him. Think of it like the Odyssey. There are so many different translations of it but there is that one original by Homer. And im not comparing Homer to God but you get what I mean.