The scriptures are cited in the chart. Which verses do you find objectionable?
The trinity doctrine is often described as being 'mysterious' or 'paradoxical' by those that believe it and base their eternal soul on it being true or not.
The concept of what god/ jesus is and their relationship should be easy to grasp and not require mental gymnastics. Scriptures clearly make distinctions between god and jesus, and most never mention 'the holy spirit'.
Your belief is based on faith - not reason. You know that you are not your parent, why are you trying to convince others that god is his own parent?