Greenspirit

how do you stop someone who does all slants or deep posts and slants and does a hb out. If I do a cover 2 he passes to half back and gets 5, if I do a man cover 1, he hits a slant because my blitz won’t get there. It seems the qb gets too much time, I can’t get anyone there unless I do a full blitz then there are too many openings to throw between. How????