lol once you start picking and choosing what to follow biblically you end up with a god of your own making...
Which is what you and everyone else has been doing.
That is what is involved in a process of biblical interpretation that construes an entire body of scripture as representing a single doctrine or theology. Once you develop proof-texts and, say, use Paul to interpret the gospel of John and the like, you are picking and choosing which passages are used to harmonize other passages with. Synthetic theologies like Arianism and trinitarianism involve this process, although they differ in the texts they privilege and in how the texts are interpreted as contributing to the overall system (which must by its nature draw on interpretive traditions and constructs external to the "proof texts"). This is a primary means of making meaning and advancing theology into new directions. But this endeavor is different from trying to understand what biblical authors may nor may not have intended to convey.