We all have our days that we can be total jerks - sounds like this one was your husband's day. Let it go - but one day after good sex and he's all happy tell him it makes you crazy when he minimizes your job of raising the kids, etc.
But the thing that popped out at me about your post was the potty training. I never spent time gettin gmy kid on the potty. YOu need a new method - I learned this one from Dr. Phil's show (my mom called me at work to tell me to hurry straight home so we could see it - in the days before we had a DVR)
You need 3 days straight - when you're not going anywhere and will be hanging around the house. I started on the friday of a 3 day weekend and by Monday my son was using the toilet and had only 1 or 2 mistakes after that.
It's based on positive reinforcement. Instead of punishing or disciplining the way to toilet training, it's all about being upbeat. Tell your child how excited you are that they are going to be using the potty all the time. Tell them that you're going to have a party for them when they're through with diapers. Figure out what would motivate your child as small every time rewards and as a big reward. For us it was m&m's and Rescue Heros (it was a long time ago).
EVERY time my son used the toilet that weekend we made a huge fuss - "yay! I'm so proud of you - wow you did it! - excellent job! Here's some m&m's!" and he'd get like 10 m&m's. We told him when he used the toilet for the whole day we'd arrange to have a Rescue Hero call him! (my husband's a cop but he liked Billy Blazes the fireman - go figure) So at the end of day 1, my husband left the house and "Billy Blazes" happened to call him to congratulate him - tell him "what an awesome thing - you must really be getting to be a big guy now!" Day 2 now my son was on the program. We made cupcakes together, went to the store together, bought soda and some chips and got him excited about the "party".
We continued with the accolades that day whenever there was success. WE threw confetti, made huge "woohoo's", gave m&m's, etc. He did have an accident - but the trick is to almost ignore it - no big deal, clean it up, quietly, change his clothes and move on. No punishement, but very little comment other than, let's get changed out of these wet underpants - feels kind of yucky I guess. Very under-played.
The third day make sure you have grandparents, aunts & uncles, favorite cousins or best friend lined up for a late afternoon party. When he's made it through that day break out the soda, chips & cake. Put a few candles on it (what 3 yr old doesn't like to blow out candles on a a cake?) and sing "for he's a jolly good fellow".
My son was ready to use the toilet and it was amazing how easily it worked when we ignored the negative but made a huge fuss over the positive.
Good luck mama - in dealing with your knuckleheaded husband and the toilet training!