Unfair gameplay script

From last 3 events, when I play VSA matches, opponents always get the advantage of more great chances even when both mine and opponent's OVR is equal. Before the match chances are shown equal but during match, opponents get more great chances therefore it doesn't matter how well I play, the advantage is chances received by the opponents always let's the draw or win the match. Everyday this issue is occurring. Pushing up through rank has become so frustrating for me. I'm not allowed to move past 5 stars.