Game wise
I find that mixing 28-33 year olds with young'uns (18-22) a good mix - 50-50%

Game-logic wise
Lvl1-4 I won back to back leagues (including 26-0-0). Lvl5 I started to get trolled. Also at your level, there are many more active managers compared to lower levels where you meet bots more often than not. They make it easy in the lower levels also because it is to get u hooked.

After 7 unstoppable season, you are due a lot of troll results. So bear with it. We all need to get trolled.