The first train I saw leave whilst queuing for Brighton (which I couldn't get on) was a 3 car. Hopeless.
I generally expect a 30-40 minute wait to get on a train back to Brighton for evening games now. I try not to stress about it. I just make sure I have my podcasts to listen to, and zone out.
Left on 90, joined the train queue at 9.40, got back to Brighton Station at 10.15.
Then a quick mince down to Churchill Square, a 1 to Portslade, walked through the door at 10.52. An hour and ten then. Not great, but I've had far worse. And I'm dry.