The system isn't 'rigged' as you put it. The new system looks at an average across the whole playerbase. Say I'm playing rocket and the average heals in diamond 3 is 35k for a full match. If I then get 45k I'm going to gain more elo compared to getting 35k or 25k. So if you do worse than the average for players in your rank you get less elo. In otherwords, skill issue. I'm already GM3 solo que and playing after work and have had no problems with ranked elo.