I took my first club to level 20, and like you became bored with the game. it became impossible to sell players. I was being put in cups each season with teams 4 levels above me. the champions league was impossible too due to 2 or 3 extreme token buyers being at my level. and I mean extreme. 8 star teams. ridiculous.

so I took over a level 11 team team who had never won a trophy in their history. i don't buy tokens at all so fancied a challenge. first 2 seasons spent completely rejuvenating the squad resulting in 2 4th place finishes. next 4 seasons 4 league titles and 2 champions leagues and a new found enjoyment of the game. take the plunge!