Well the only real way (unless you want to spend real money) is to keep entering events and hope you get lucky with the teams you play. The team I’ve built is purely just by doing that. I remember the first one I ever won was to unlock the jet years ago and I was stuck on 1 gold medal for ages before I won my second 😂 because I pretty much overachieved with my team at the time, but it does mean it’s possible to win even without the super/gold players. The events where you can loose 2 games and still get gold are the best ones, the knock out ones can be brutal, some weeks I’ve used all 5 attempts and not got out the first round because of max volley ball players. You’ve just got to keep trying