I wouldn't get all bent out of shape at your source. Yes you will gain on test only, test and deca is more than you NEED for your first cycle but guys have been running this cycle for decades so its up to you IMO. He may think (most gym guys I know do) that you have to have at least 3 compounds to make good gains he is not necessarily trying to screw you over that didn't need to be said IMO if this guy is your buddy just talk it over with him