We are reading the opinion of one side. Perhaps we should listen to the MIL’s opinion which of course we won’t unless she visits YWCF and figures out that she is subject of discussion.
By the way, is this man who is complaining receiving support from the wife’s parents? If yes, then some parents who support go with the old Yiddish saying of “ver es hut the maya hut the daya”, meaning whoever has the money, has/gives the opinion. It is very rare that this will not happen!!!!
And if this is not the case,then discuss this with your Rav who you feel comfortable in discussing anything with.