Looking for hard SciFi book recs! +My opinions on the books I've read

Tl;dr: I have recently started reading SciFi, and have been on a hard SciFi kick, so would love some recommendations. I am willing to sacrifice well written characters for the sake of science. Included below is a summary of my opinions on books I've read so far below, but the Tl;dr-list is:

Sea of Tranquility - Bad:/

Dark Matter - Bad (maybe just a bad translation)

Memory called Empire - Great! but not 'hard' enough

Kindred - Great! but not 'hard' enough

Silo - Okay, but not 'hard' enough

Murderbot -Good, but repetitive

The Martian - Great!

Project Hail Mary - Great!

Artemis - Great! But r/menwritingwomen

Seveneves - Great! (But fascist undertones?!)

Feel free to skip/skim the rest! Also; slight spoilers:

Sea of Tranquility (Emily St. John Mandel)

Starting with the weakest of the bunch; read it less than six months ago, and can barely remember the plot. I'm not a massive fan of the multiple protagonist writing styles, and thought the resolution was kind of meh. Also not really the style I'm looking for:/

Dark Matter (Blake Crouch)

Also didn't really do it for me, but might be because I read a terrible translation. Some stretches seemed Google-translated (like PLEASE JUST write 'uncanney valley' in english - NO ONE has ever called it 'spooky valley' in my language just STOP!!) But that aside, a lot of the plot was kind of predictable, and the protagonist just couldn't keep up. E.g. guessed the identity of the kidnapper on page three, and the protagonist spent half the book clueless; like 'WHO could this mystery person be??! They seem soooooo familiar?? Hmmm?'

Memory called Empire (Arkady Martine)

Just an immaculate piece of writing, the characters were so well written, and the poetry and references to previous chapters were like little scattered presents throughout the book. Also loved the naturally written queerness, the characters felt very authentic. However it didn't really give me the sciencey feel - it read more like a diplomatic relations/spy thriller (in space, with aliens).

Kindred (Octavia E. Butler)

The concept of a black woman travelling back in time is absolutely horrifying, and having to maintain a relationship to slave masters at the threat of your own existence was thought provoking, and well written. So definitely a great book, but like the previous, didn't quite match the genre I was looking for, and seemed in some ways closer to a period piece than SciFi.

Silo (Hugh Howey)

A pretty good book, kept me entertained, but wouldn't call it a masterpiece. I think it leans a bit too dystopian for me, and while I love a bit of mystery and intrigue, I'm still not getting my hard Sci-Fi endorphins:( I guess it's limited how much science you can cram into a bunker where no one really understands how everything works.

Murderbot Saga (first four books) (Martha Wells)

Loved the character(s). Great inner dialogue, but had to take a break after four books because they were all pretty much the same: Go to new planet/station to collect data, meet people you don't wanna care about (but learn to love), save them and fight a bunch of people, then leave. Hopefully the rest of the series switches it up a bit. But plus points for being the first books written in first person that I didn't hate!

Andy Weir trifecta: -The Martian

Great book, what got me into SciFi! Love the 'capable protagonist adapting to a difficult situation with high stakes'-trope.

-Hail Mary

My favorite Weir-book. Thrilling, high stakes, clever solutions to impossible problems, and an entertaining mystery on the side.

-Artemis

Good book, although slightly weaker than the previous two, because OMG can Weir not write women! Like the completely unnecessary descriptions of her body/outfits as well as hypersexuality and self insert socially struggling mechanic man :( Just please talk to a woman) However, I can handle a lot of bad characters (and they weren't /that/ bad) if a book scratches my SciFi-itch.

-Seveneves (my current read) (Neal Stephenson)

Absolutely just what I am looking for in terms of /hard/ SciFi. Loved the two first parts at least, but the time jump skipped over the most interesting part, and felt unnecessary. The characters were so-so at best, but who needs flushed out characters when you have thrilling science! What really annoyed me though was the sudden, unapologetic, /eugenics/ !?? Like I thought the 'trains running on time'-line was a clever nod to fascism when describing the Swarm, but suddenly a few pages later the seven eves+1 agreed on eugenics unanimously? You /cannot/ convince me that epigeneticist Moira, or sociologist Luisa had no qualms about implementing eugenics on the assumed entirety of the human race. And the idea that the seven 'races' were kept separated genetically for 5000 YEARS?! Utterly ridiculous. I honestly believe that Stephenson just couldn't for the life of him muster up any new characters for part 3, and just made up a quick-fix for previous personalities to be copy-pasted into the future.