Earlier quoted context omitted.
One thing I've noticed about Liu Cixin's books, is that for people who follow futurism and hard Sci-fi beyond the shallow level of a typical mainstream layperson, there are huge glaring plotholes. Here's perhaps the big one: Ask, what if instead of doing [X], [certain characters] put those resources instead into building space industrial infrastructure space colonies? This also applies to The Wandering Earth.
In general, I get the feeling that the people who gush about all the awesome ideas in the 3BP books, are not people who read very much sci-fi. Not that there's anything wrong with that, of course. But those ideas have been explored previously, and much better (IMO), in other less popular books.
My favourite one so far was Broken Earth trilogy.
I'm looking for something new and really awesome but I'm not interested in a series with more than 3-4 books (as they rarely keep the same level of quality across the series).