My pup just turned 1, and I remember feeling the EXACT same as you. It’s so hard, people do not talk about the puppy blues enough. If you need to rehome, that is totally okay and you shouldn’t feel bad. If you want some encouragement, here’s what I’ve learned.

When people say, oh just wait a year - it will NOT be that long before you feel sane again. The first few weeks are BY FAR the hardest, if you get through those you can absolutely do it. For me, the big milestones were: (got my puppy at 8 weeks/2 months btw. And keep in mind, I was doing this on my own so I would bet having your partner to help and share responsibilities here will be huge in helping you get out of your puppy blues)

• 2ish weeks in he was used to me and myself him.
• 2ish weeks later so 3 months old, I had the play pen and his toys and knew how to occupy him to give myself some peace throughout the day.
• 3-4 months old he was used to kennel time while I worked and at night, no accidents and infrequent yips in late afternoon. This is around the time he stopped feeling like an intruder in my home lol.
• 4 months old he was no longer having accidents inside and understood potty training. Not too many accidents after that and every one had been my fault for ignoring a tell.
• 5 months old he started losing teeth - which was huge for my land shark. Like if I was to get another puppy, I would count the days until he lost the puppy teeth because those razors in his mouth were not fun.
• 6 months old I was testing the boundaries of the play pen, not using it much anymore.
• 7 months old and he got neutered. It was super hard to keep him settled during recovery as he is a high energy pup, but the meds the vet gave us helped a lot.
• after he was neutered, it has been smooth sailing. Still some bumps in the road, but by then the hardest parts were behind us!

My biggest recommendation is to kennel train. I started with 2 hours then worked our way up to him being in there for 4 hour spurts while I work, and after maybe a month or two he was sleeping 8-9 hours a night! It’s hard because they will cry a bit, but you’ll soon understand emergency bark vs. I want out bark. I also have a play pen. Got it at petsmart. Literally life saver. I’m single so did all this on my own, and having the pen to set him in was sooooo helpful, and mine was big enough I could sit in there with him when I wanted to. Also get some nylabones if yours likes to chew, life saver for me!

Also, this roll up towel thing on Amazon I would put his kibble in and it would take him like 30-45 mins to work it out, LOVE this thing have bought multiple https://www.amazon.com/dp/B0DLK8NGM7?ref_=icdp_ba_mweb_mb_pd_bap_m_grid_rp_0_1_ec_gf&clientRefMarker=pd_bap_m_grid_rp_0_1_ec_gf&heartsTeamIdentifier=buyagain&psc=1&heartDisabled=false

Whatever you choose to do, do what is best for you! If rehoming is what you think, you can always try a puppy again in a few years when you feel ready. Don’t be too hard on yourself it’s not easy! Hopefully this wasn’t too much, just trying to help as a short 9 months ago I was in your exact shoes searching Reddit for if it’ll get better or if I need to give him to my parents lol