And, no regrets on confronting, filing for divorce and drawing boundaries...you have to have respect for yourself for your spouse to ever respect you again.
Yes, you do, Nb, as you still have to live with YOURSELF, no matter what happens with your MARRIAGE. I respect your stance.
Try to give grace to your husband, and leave the door open. Somewhere down the road, he may begin to show himself to be a man of consistent character and quality again, and who knows?? Maybe you'll feel differently then.
But no, it doesn't surprise me. This forum (and others) is littered with the stories of LBH spouses who eventually became the walkaway ones, as their spouse's infidelity caused them to lose all remaining respect for them. Marriages harmed by infidelity can -- and do -- turn around (mine did), but most with unrepentant affairs that last much beyond six months or so seem to do irreparable damage to the marriage, at least in the immediate term.