Peace Jkhan,
I think I understand what you mean.
There is nothing equal to the God. If one gives an equal it's like replacing God.
But in some way, some people think that the God is the most powerful but attribute some power to other thing that don't have power.
They don't think well (my understanding from some verses).
and there are those who forbide what Allah didn't forbide, in the following verse there are those who associate
6.148
Sahih International Those who associated with Allah will say, "If Allah had willed, we would not have associated and neither would our fathers, nor would we have prohibited anything." Likewise did those before deny until they tasted Our punishment. Say, "Do you have any knowledge that you can produce for us? You follow not except assumption, and you are not but falsifying."
16.35
Sahih International And those who associate others with Allah say, "If Allah had willed, we would not have worshipped anything other than Him, neither we nor our fathers, nor would we have forbidden anything through other than Him." Thus did those do before them. So is there upon the messengers except clear notification?
Somehow they are remplacing God, we can think that or they are ruling with God.
You are right... So simple as that..