There is maybe one or two matches a season that I consider "trolls" when a team loses (or wins, or even a draw vs. much weaker team) for no apparent reason, no matter what I try. Most of the time the results are understandable.
The double corners thing hasn't come up for me as much lately, but it sure is annoying.
If your team is losing a lot, try putting some of the bench guys as starters, look who has the worst ratings and bench them.
Trying changing one thing at a time so you see what effect that change has made.