“...the doctrines which its inspired leaders taught were corrupted and changed by others not of similar inspiration”
Well the article is spot on with that statement. Even a brief look into church history will reveal how Constantine and the Roman church made many revisions to the Messiahs message just 300 years after His ministry. And the corruption continues to this day. Do your own research and try to keep bias out of your conclusions.
Well, sure it's easy to side with the Mormons if you blame Rome from the get-go.
The problem is that this writer -- and the Mormon church -- claims that the complete apostasy took place "not long after its formation" (meaning Jesus jumpstarting His Church).
(Elsewhere the Mormon church claims this occurred when the apostles had died -- so IoW, early in the 2nd century after John died)
The problem -- for your claim is -- that "The first bishop to claim primacy in writing was Pope Stephen I (254-257) Primacy of the Bishop of Rome
IoW, Rome didn't really "rule" with much of an authoritative hand -- other than Victor, bishop of Rome, attempting to end a controversy toward the end of the 2nd century.
So you blame Rome...but the Mormon church blames the church as well as those OTHER than the Rome-based leaders.
So...classic fail on your part history-wise -- to link up the two...