Must I abandon people to commit the forbidden and disbelieve, even though I try to advise them but those around me prevent me, and what is the reward for giving advice in the sight of Allah?

May Allah reward you for your denunciation of these great evils. Remain steadfast in this ritual, for we have explained a piece of advice from Ibn Rajab that will ease for you the distress you encounter in denouncing evils. Denouncing evil is an obligation according to one's ability and capacity, and Allah does not burden a soul beyond its capacity.