Why have I been getting such tough league and CL draws every season?

[Tactician]

Someone from the same level and server added me as friend last season. This season he is in both the same league and cup as my team, but he does not look like a serious threat. So, I will no remove him. There is another though who added me as friend this season, and he is in the same Champions League and Cup; I will probably remove him at the end of the season as it seems he is very active and competitive. Both of those are unknown person as such; they just added me in the game for only they know the what are the reasons.