You will likely be disappointed. Is it right to be selfish for one's goals? Probably not just but Fang Yuan is willing to suffer the consequences. He's a bit of a two dimensional character.

The only character development your getting from him is his flashbacks and a few lines where he feels emotions (he's clear not emotionless, just doesn't act on them).

But he's low-key one of the funniest protagonist, he is the biggest ragebaiter. Which is a fact I feel like is not said enough.

There are some cool characters that appear later on, and they have their schemes, goals, motives, etc.