The author of this claim presented no contradictions in the Noble Quran at all. All he did is present Noble Verses 10:68, and 2:116-117 to prove from the Noble Quran that Allah Almighty claims that he beget no sons (which is totally agreed upon by the Muslims).
He then uses Noble Verse 6:101 which states "To Him (Allah) is due the primal origin of the heavens and the earth: How can He have a son when He hath no consort? He created all things, and He hath full knowledge of all things." as a point against Islam, because he assumed that the Quran defined Trinity as the Father, Wife and Son. Well, this assumption by him is totally false, because Allah Almighty in the Noble Quran (1) Never defined Trinity as Father, Wife and Son, and (2) Allah Almighty did comment before on those who worship Mary the virgin (who are called Christian Roman Catholics today) as the Mother of GOD as rejecters of truth, see 5:116.