Key Scripture 2 Timothy 3:16 should have been translated as “Every scripture inspired of God is also profitable for teaching” like many other serious Translations (such as American Standard Version ; Douay-Rheims Bible etc) as it is what the Greek Text says.
This is in harmony with the contents of Bible and also with the writer Paul himself who knew after his departure ‘even from his own number men will arise and distort the truth.’ (Acts 20:29-30) For example, verses such as Romans 7:19 is such distortion. Such verses cannot originate from real Paul who was “holy, righteous and blameless.” (1 Thessalonians 2:10) Hence Paul had the freeness of speech to tell others to be “blameless” like him (1 Thessalonians 5:19-23; Ephesians 5:24) There are many things in the Scriptures which are not inspired such as words of Satan, words of Job’s wife and his false friends, words of Judas, Lot’s daughters …etc. Apostle Peter never disowned Jesus because if he had done so, his contemporaries would have interrupted him when he rebuked Jews, saying: “You disowned the Holy and Righteous One and asked that a murderer be released to you.“ (Acts 3:14) His listeners would have asked him “What right do you have to reprove us for ‘DISOWNING Jesus” when you yourself have done it first?” All such verses or accounts were later adoptions. (2 Timothy 4:3)
Enormous amount of harm was done because of such wrong Translations. When lovers of truth rightly raised their doubt about certain verse, they have been excommunicated/disfellowshipped throughout history. Instead of correcting such translation errors, NW Translation imitated other translations which render “All Scripture is inspired of God.” (https://www.jw.org/en/library/bible/study-bible/books/2-timothy/3/)
This is only a sample though I have noted some other.