Sorry, mama, for all you are going thru right now. It really chaps my hide to hear that your dh feels this way.
: ABSOLUTELY the only way he'll really know what you experience on a daily basis is to do it himself. And, sorry, a half-day at the park does NOT a 24/7 schedule make. Sorry.
Make it AT LEAST an 8 hr day, complete with: morning nursies, getting ds dressed, making ds breakfast, helping ds potty, packing ds snacks/lunch, giving nursies for the road, getting ds in and out of the carseat, running NECESSARY errands (not just getting in the car and going to the park and then coming home), waiting in line at the store or bank while ds squirms and wants out of the shopping cart or stroller, worrying that you haven't given him a potty-tunity yet, finishing said necessary errands, going to a playground and hovering over ds to make sure he doesn't tumble off a structure that he's too young for, mid-morning nursies, attending a harried lunch date with a few moms but not being able to enjoy it because ds wants up or down or to walk or be in your lap or doesn't want to eat this or that, but wants to nurse instead, enduring gawping stares from people at the next table, pottying ds in the smelly restaurant bathroom with no toilet paper, trying to pay the bill while ds is wandering off to god knows where in the restaurant, catching up with ds and trying to get him back into the carseat when he's overtired, grudgingly letting him fall asleep in the car, but then inevitably waking him up when you get home and cannot transfer him to naptime in bed, being sleepy yourself at that afternoon siesta hour but dealing bc ds is cranky and clingy from no nap, worrying about what to make for dinner, actually trying to make dinner while ds runs around the house screeching and wobbly, in some kind of manic play-mode because he's so tired, making sure ds eats enough veggies and not just the cheese, cleaning up a poopy potty after dinner (may be the 2nd or 3rd gross potty-cleaning act of the day), trying to eat something yourself but realizing you forgot to wash your hands after cleaning said poopy potty and then literally gagging on your present mouthful, trying to wash dishes while ds decides to maniacally jump up and down on the couch with no one making sure he doesn't crack his head open on the hardwood floor, getting ds to take a bath when he doesn't want to, cleaning up inevitable puddles on bathroom floor after said bath, pottying ds again before bedtime, reading 3 stories to him before he VERY reluctantly decides he's sleepy, nursing ds to sleep for 20 minutes, then trying not to get punched or kicked for 20 min while ds thrashes around in bed, attempting to settle himself to sleep, nursing for another 20 minutes, until ds finally. falls. asleep.
fwiw, i do agree with a pp... that your dh probably is not feeling fulfilled in his own career. if he dislikes his job in anyway, ANY other job will seem like a cakewalk, yk? While my dh doesn't challenge me on the fact that being a sahm is "hard work," he does emphasize that at least I get a better "reward" than he does. Sure, he gets paid, but that's nothing compared to all the precious moments that I share with ds throughout the day. DH works all day but may not necessarily reap the same amount of satisfaction I do in my "job." I tend to agree...
Anywho... I am truly sorry you're having such a tough time right now. Give it a little time and DO seek counseling at least for yourself. You have my ear and shoulder...