Christianity was started by Jesus Christ, 2,000 years ago. JWs was started by Rutherford 85 years ago. All other 'christian' religions were started by men too. As Blondie said 'why does there have to be an organisation'?
Jesus said the wheat and the weeds would grow together. He said his followers would be recognised by their 'fruits', That of showing love towards others. A whole group cannot show love, only individuals can do that. There are as many hateful, bigoted, self-righteous, prejudiced, unforgiving, judgemental JWs as there are in any other groups, christian or otherwise and just as many, if not more, loving, kind, forgiving and compassionate people among other groups. The 'love' shown amongst JWs is conditional. Conditional in that you have to be or become 'one of them'. Outside the group you are considered 'wordly' (with all it's negative connotations), even if you are a christian from another sect. If you chose to leave the JWs you become and evil hated 'apostate', regardless of whether you stay christian or not. Is that the love Jesus spoke of?