Modesty is a virtue and one that is not impossible to attain, especially since Our Lord Himself promised:
"Blessed are the clean of heart, for they shall see God." (Mt. 5:8).
The idea of a competitor to God (meaning a big one who has any power) is not part of my understanding; but I don’t have any problems if people believe that. God gives everyone a modicum of free will - but we have to accept the consequences of our acts and choices, for good or ill, willy nilly. In essence, everyone who lives in rebellion to God is a little satan. Until such time as one wakes up to the truth and takes the path towards Him instead of away from Him.
Are you related to the Church Lady on Saturday Night Live???