Maybe you've heard the story of a brother in the Watchtower's writing department who was very smart, hard working and a good writer. We'll call him Charley. Charley was so good, in fact, that he advanced through the ranks and became a co-editor of the Watchtower magazine. There was one other brother serving along with him in the co-editor position, and between the two of them, they had pretty much complete control of the magazine's content (subject to GB approval, of course).
Things went well for a few years, and the two worked together pretty harmoniously. But eventually a conflict arose between the two over a significant doctrinal issue. They argued for a while, but ultimately Charley's co-editor won the battle; it was his understanding of the teaching, not Charley's, that ended up being published.
Charley exploded. He immediately resigned as co-editor of the Watchtower. Ultimately, he left the organization and went off and started his own group where his own understandings of doctrine could be taught without opposition. He even started his own magazine and circulated it to as many Watchtower readers as he could. He continued to head up that group and publish that magazine until the day he died.
Now, do you suppose there is any JW anywhere who would not agree that Charley was an apostate?
I changed a few details in the story.
"Charley" was actually Charles Taze Russell, the founder of the group that eventually became the JWs.
The magazine of which he was co-editor wasn't the Watchtower, it was the Herald of the Morning, an Adventist magazine.
His co-editor was Nelson Barbour, and the doctrine over which they disagreed was the Ransom - certainly a major doctrine.
There was no GB involved - I threw that in as a red herring. The conflict was between Russell and Barbour, and Barbour won out.
The group that Russell founded was the Bible Student movement, precursor to the JW organization.
The magazine he founded was Zion's Watch Tower, which continues today simply as The Watchtower.
Apart from those changes, the narrative is correct.
So - how do you think the average JW would feel to know that his organization was founded by someone he just agreed was an apostate?