The same thing didn't happen to me BUT something else screwed me to stop me from getting the platinum. One of the collectibles was glitched. I had 1 more trophy left and it had to happen. I deleted my save and retried it 3 times always the same glitch. It stopped me from getting my first platinum! But i got my first platinum for Sega Megadrive ultimate collection.
By the way, its not boring. You have to play it more. I once got 8 million points in one round in the abusement park. You just have to play it more. You guys don't know gaming if it bit you on the ass.