The whole point of the three body problem series being a Chinese sci-fi is that it is the future envisioned by Chinese intellectuals. They really think that in case of an alien invasion United Nations will direct a centralized commission based human response.
Disliking three body problem for the reasons you mentioned is like disliking 1984 because it had too much of totalitarianism for your taste.
Reasons like? Bad science? It's objectively bad there, in the sense of making shit up without even remote plausibility.
Simpleton depiction of social dynamics? It has nothing to do with Chinese intellectuals; Strugatsky brothers and Stanislaw Lem did nuanced social commentary while living in similar regimes.
And seriously am a bit at unease with the implication that it have to be flawed because it's from China. There are great, eloquent Chinese authors. Do read Folding Beijing (also not a hard-SF), it's simply in a different class.
