Bob is a man who people either despise or like

[Bassim]

Have I made any mistakes?

Bob is a man who people either despise or like. Some think that he is arrogant and full of himself, while others find him genuine and ready to stand up for others.

 

[Tarheel]

The American expression is:

People either love him or hate him.

(People often judge others by different standards than what they would want to be judged by.)

 

[abaka]

If you want to keep the original sentence, better drop the "who". It should be "whom", but an implicit "that" (left out) will do just as well:

Bob is a man people will either despise or like.

Tarheel's love-or-hate phrase is a very good one.

Bob is a man people either love or hate.