Winston:
I am probably the last person who ought to comment on this. I never was a dub, and I have two marriages and two divorces behind me. I am a 'worldly'. But I'll offer my thoughts in support for what they're worth.
First, along the lines of what jgnat said - I am old enough and experienced to know that the LAST thing a marriage in difficulties needs is a third party wading in with unwanted, useless and threatening comments. Especially drawn from misogynistic and illogical ideas. Third parties can be useful if they are non-partisan, non-judgemental and sufficiently professional as to inspire confidence in their capability and discretion. I leave it to others to comment as to whether JW Elders meet those criteria.
Second, 'read the bible or WT pubs and all will be well' is palliative, non-specific and practically useless advice. A cop-out, IMHO.
Third, you mention the NT entreaty to 'check and test' what's being taught - an entreaty with which I entirely agree. You may wish to draw a parallel between WTBTS who teach this (reluctantly) but will disfellowship you if you apply it and some branches of Islam which will kill you if you follow it.
Fourth, this is a purely personal view but I can't help wonder if the 'service to WTBTS' isn't one of the 'stumbling blocks' of this marriage. IME, successful marriage is hard enough when partners are entirely free to be themselves. What it must be like when a third party, especially a third party with the issues WTBTS displays, is involved I can only imagine.
I wish you (and yours) well.