C., I am not sure how the Jehovah's Witnesses worship privately, I only know a very little about the specific beliefs. I don't care what someone else believes or want to dictate that. I don't agree with the little I know of this faith's beliefs, but how someone worships in private is not my business.
That said, selling God door to door as if he were a box of girl scout cookies is very presumptuous. God is for everyone, no one else has the authority to give God to others. I also dislike their messages of negativity. They always start with something like, "You must be wondering in times like this, why God has allowed suffering in the world..." Um, no. Maybe the Jehovah's Witnesses have those kinds of doubts, but I don't. Things are the way they are, and they are the way they are meant to be even if they are not pleasant. No one should presume to know what I am thinking or what I believe.
If this faith leaves you feeling spiritually fulfilled, then that is all that should matter for you.