Yeah, I had a tight game in the CL final against weaker team as well. He didn't show up, his ST got injured in the 1st half, he didn't even set auto subs. I used all the possible orders and formations, but barely won 2:1 with a winning goal at the end of the game. I've lost 3 finals in previous seasons, two of them against weaker teams and was ready to lose again. I have a collection of the 2nd place prizes, so I now how it feels. I just agree with what NeoWilson said.
But hey, your next treble is gonna be way more sweeter now.