I feel pretty sure the JWs were not solely responsible for the break up of your marriage. No way!
I've never heard them say to break up the marriage to any sister/brother. If anything, I've heard them teach for the sister (mainly) to hang in there, praying to Jehovah, in hopes that she'll gain the husband's approval and he'll become a JW himself.
However, having said that, some women/men are abused in some way or are extremelly unhappy, but lack the network/strength to leave a bad relationship to begin with and they find this strength and the network to finally leave a mate once they join the WBTS.
These are the cases that I've seen.
Unless you were married to a nut case, like so many I see joining the R&F of the WBTS, perhaps a sincere self-exam will reveal the real motives for your mate leaving you.
DY