“And I ran, he ran, we ran, they ran, she ran…etc. there is no verb conjugation.”
Depends on the verb tense. Plenty of verb tenses don’t have conjugation - such as conditional (I would run, you would run, he would run), or future (I will run, you will run). But yes, in the present tense, the verb run IS conjugated according to the typical rules of English, which are -s for the third person singular.
Think of it this way. I make up a new verb. Poogle. We all intuitively conjugate it as I poogle, you poogle, he poogles, we/you/they poogle. It’s a conjugation. Any linguist would agree. It’s not as difficult as conjugating an irregular verb such as I am, you are, he is, we / you / they are, but it’s still a conjugation.
I really don’t know why you’re fighting this so much. Just admit that you were wrong - we do have verb conjugation in English. not as complex as other languages, but we do.