I don't think you're unreasonable for wishing you had a baby in lockdown, I didn't and keep thinking how the shitty first 6 months would have been a whole other level of shitty if I had. To the person who said having a baby is easier than other ages... it might be easier but it's freaking MIND NUMBING at the best of times. I have a 2.5 year old and it's not always brilliant, but honestly, we're allowed our nanny where I am (abroad) and DH and I like WFHing so... it's actually ok. I think having primary age kids and an employer that isn't understanding would pretty dreadful... but a newborn is definitely up there for worst ages during lock down.
I do think you're unreasonable for not considering taking some of the advice on board, your evenings might feel like they work, but if you're finding life really shit at the moment (which is reasonable), changing up the evening might actually help you, despite what you think. If you don't want to change your evenings and your DH is WFH, maybe he would take a couple hours out in the middle of the day and then work in the evenings, just to break up your day some since you're going to bed early anyway. That might suck for him, but I can 100% guarantee your life sucks more right now and he can learn how to put the baby down (seriously, just give him a chance for a few nights and he'll obviously figure it out). Or, better yet, get him to take a couple months of shared parental leave.
Also, if you don't have anything better to do, I'd be working on getting your DC to sleep independently, honestly, that alone can be pretty life changing even if you can't leave from the house. My DD was a crappy napper until 5 months, then she napped for 1.5 hours 2x/day and until I went back to work almost a year later, it was fab. I was still stuck within baby monitor range but I could cook (which I love), I did a ton of sewing for myself and frankly, just sat on our roof deck by myself with a glass of wine and a book every afternoon in the sun.