The treble is difficult but possible. I still haven't achieved it but I have gotten close many times. I thought I was going to get it this season since I'm poised to win my league and I'll be featuring in the CL final and I was in the Cup final against a team I feel I could defeat, but they got the better of me in the end unfortunately.

My advice is, if you aren't paying to play this game, I wouldn't worry about it. I don't really put cup/CL defeats high on my list of things to get mad about since cups are a mixture of luck and skill anyway. As long as I win my league and prove im the best among the heap each month that's good enough for me. I think it's awesome that I can win 2 trophies in a season without paying for scouted players or extra tokens, especially when I know I'm beating people who are to win those prizes.