im not good?

ok..
i try to learn to point out other ppl mistake.. maybe the way i try to express is quite erm.. how to said? more to protect my own advantage?
so that why people hate me now...

since then i realize that i better keep my mouth shut and just let it be the way they wanted to..
this is other people life and attitude, what for they have to change just because I'm not satisfied with whatever things they had done? who am i?

i think I'm not good, not perfect..
keeping myself in low profile making people felt that I'm good only...

but then,
me myself cant accept critic from other people, will other people accept critics by me?