And this is how I myself came to be one of these hated KJVOs. When I was a teen and only saved a short while, all I had was the scriptures, my family was not religious whatsoever and rarely attended church. But I had a KJV I used to read nearly every day for hours. Then at Christmas my Aunt sent me an RSV which I also read. I immediately saw they were very different, and the footnotes troubled me when they said things like "better manuscripts omit this verse".
Now, how is that to be understood? This RSV was telling me my KJV was inferior and contained mistakes. I can tell you this, this did not give me assurance and confidence, it did just the opposite, it created doubt in my mind and much confusion. I just wanted to know the truth. I would pray and ask God to show me the truth. I did not want to know the teachings of men, I already knew that every man has a different opinion on everything and could not be trusted.
So you made a hasty conclusion without investigating the matter.Better manuscripts do not have a number of verses which the KJV included in their version. It was not an evil intention on the part of men centuries ago-- but we have more knowledge today -- earlier manuscripts are available for which the KJV team or Erasmus had no access.