The "Lady Astronaut" series [1] by Mary Robinette Kowal is not first rate, but it is reliably entertaining and a fairly Hard SF alternate history with some interesting choices.
I'm going to take a liberty and also recommend a much older SF book that I rarely see mentioned; "Fiasco" by Stanisław Lem. This one's all about the characterization and the big picture of humanity's fatal flaws. Not hard SF as such, but he tells a good tall tale when he needs to mess with space and time.
[0] https://en.wikipedia.org/wiki/This_Is_How_You_Lose_the_Time_...
[1] https://www.goodreads.com/series/193730-lady-astronaut-unive...