Many thanks for your brief and to the point advice.

Actually I tried to make the topic as short as possible, while picture is really darker than you believe.

That coworker and the mentality of the people their are horrible.p
I am so miserable, life is always tough with me.

The coworker will not leave me live in peace even if I left the job, he has extensive hatred feelings towards me, he has a clear inferiority complex.

I met a lot of people I was always recognized as a kind, decent and helpful person, never faced someone like him, he is the kind of person who abuse any kind one he meets.