You can call anything you want anything you choose, “God” or otherwise, but that does not make it true.
I have shown you why your belief that the Holy Spirit lives in everyone is mistaken:
You still have not said what he/it teaches you, unless it’s that he lives in everyone, but we know that is mistaken. Is there more that you are taught in the midst of your situations? You have only repetitively said that it happens, but without content. Teaching involves content.
A problem with a relationship is what sin is. I don’t know if you have or had a good relationship with your parents or not, but if not, you can at least imagine a good relationship. Breaking that good relationship by being disrespectful or disobedient and rebellious is analogous to what sin is with respect to our relationship with God.
I still need some explanation about what that means – I have no idea.
The Bible tells us (and we know from nature, of course) that the life of a creature is in the blood. When we sin (and we all do and have) and by our rebellion we have destroyed our individual lives with God and we have died to him and become like delinquents on the streets and disowned. (Once again, no, the Holy Spirit does not live in everyone.)
Jesus is how that life is restored, by accepting his sacrifice for us and believing in him, and we become ‘born again’ to him, adopted into his family. I’m sure that is not an entirely satisfactory answer and I don’t know that there is an adequate one. There is certainly some mystery involved, but in multiple places in the Bible, Old Testament and New, that is what we are told and I have reasons to trust it. When we believe in Jesus and trust him with our lives, then Jesus sends the Holy Spirit to live in us, not that we are immediately perfect and cannot still sin.