Why doesn't God prove Himself to us if He exist?

What I understand from this Brother Eli's video:
https://3speak.co/watch?v=fatimajunio/mbzagknj

God had already proved himself before this our present generation. With the many miracles and wonders he performed in Egypt, which confounded the wise men of Egypt, he showed his superiority over them, including their many gods and goddesses.

We saw that the so-called god of the Nile had no answer to the turning of the Nile to blood by God.

In the presence of about ten gods and goddesses which included, Amut, Mut, Osiris, Anubis, Horus and the rest, God did miracles, and sent plagues to prove that those gods of Egypt were nothing.

God opened the Red Sea for Israelites to cross on dry land but, the Egyptians were drown as they tried to cross. Psalm 106:10-11 gives glimpse of this story.

All this shows that the God of Israelites is the true and most powerful God.