The translation doesn't help, but the issues with the books go beyond it. It's obvious that Cixin Liu is not a good writer. The characters in TBP are cardboard cutouts and his pacing and framing of ideas awful. I feel that there is merit in his imagination but it'd be better presented in a different format than science fiction.
To truly see how bad he is as a writer, compare him to the greats:
Stanislaw Lem, Gene Wolfe, Iain Banks (Culture Series), Strugatsky brothers, Kurt Vonnegut, Robert Heinlein, J.G. Ballard, Ursula Le Guin, William Gibson ...
Since Dune was mentioned in this thread, I find the first two books to be absolutely in a different league than TBP as they're complex socio-political SciFi masterpieces that have stood the test of time. I've read Dune more than 9-10 times already (as I've read and re-read most of the books by the greats I previously mentioned). Can you imagine doing that with any of the TBP books?