Hi there! I think I may be blind but I can't find your Lo's age anywhere? Is he about 11-12 weeks?? Sorry, it's probably there and I don't see it lol
My Owen has that same bouncy seat - don't you just love it?!? I am sorry you are having such a rough time! Looks like Heather has given you some excellent advice. I just wanted to add a few opinions of my own, I hope this is ok!
About swaddling, Heather is SO right - spirited LO's Need a swaddle! Babies who hate swaddling, need it the most. Owen is a HOT baby, we used a thin cotton bed sheet cut up into squares to swaddle. He is also a BIG baby and the sheet cut up was bigger then any blanket so it worked two-fold. Perhaps you can try that!
For the 3 hour easy vs the 3.5-4 hour easy. You said he won't take his whole bottle at the 3 hour mark. Have you tried giving less in the bottle, and moving to the 3 hour easy which will give another feeding? So in the end, he will be getting the same amount of formula in 24 hours just less, more frequently. That way, he can do the A times for 3 hour easy. That may be easier. Just my thought!
I agree with Heather about the 4S's, a wind down is SO important for every baby to have - its like a transition for them from HI IM AWAKE to ok its time to sleep now. It helps them relax enough to fall asleep, and stay asleep. I highly rec a dark, very dark room - we use tinfoil over the windows. Have you tried white noise? We use a fan set on high facing really close to the wall - works great.
I also agree he is overstimulated and overtired. I wouldn't do any walking about with him. I would go in his room 15 mins prior to the end of his A time (so if his A time is an hour, start the wind down after 45 mins of A time) and start the 4 S's. If you need to rock, perhaps you can do that for 5 mins before you start the wind down - that's just my opinion. Set the stage, swaddle, and sit quietly and softly talk to him or sing or hum with him up on your shoulder. If he is freaking out you can start to pat/shh him while on your shoulder. If he is ok, move to the crib and set him down, say I love you, time for sleep or whatever and duck out of his sight. Put him down calm but awake. You want him to associate feeling sleepy with being in the crib. Now keep out of sight and wait! If he cries, go back to him, turn him on his side, and firmly pat his back with shh. If he fusses wait and see what happens, wait for a cry. Some babies have to fuss to settle, so wait and see what he does.
Like Heather said, you can experiment with the kind of touch he likes. Owen hates Shhing, he likes just a firm pat on his back. Some like butt rub, back rub, butt jiggle, head rub, ot just a firm hand on the back. Humming, shhing, singing, soft talking, or nothing. Find what combo he finds soothing and go with it. Do this until he is calm, then slow it down, slower, slower as he gets more and more settled, then stop, and keep your hand on his back for a few moments, then remove your hand and just stand there quietly and watch. If he seems settled and going off to sleep sneak out, if he starts up again, you start again with patting and shhing and repeat the slowing bla bla bla.
I think the big trouble here is he is way overtired. I would rec moving to the 3 hour easy if you can, those A times are better, and he will still get the same amount of formula, just divide it into 6 bottles instead of 5. If he is less overtired, he will be less overstimulated and it will be easier (much) to settle him for sleep.
You are doing a fabulous job, having a spirited LO is HARD WORK! It's hard to know what they want, and what helps. And you are right they don't give you any hints Lol! Remember this, you are changing how he sleeps - he is going to be mad about it, and crying is how he will let you know. He has no other way to tell you.
Big huge hugs to you. I hope some of this is helpful. Be a detective and find what form of pat/shh works and go with it - who knows you may find something new that is settling to him and come back and share it with us!
Chin up - this is a tiny section of time in his babyhood, it'll pass and get better, I promise.
Love,
Zoey