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An enemy complex is in modern psychology a mental disorder in which a person falsely believes he or she is surrounded by enemies. Additional disorders of the mind generally accompanied with an enemy complex include paranoia and low-self esteem.
Mike Tyson described himself having an enemy complex. Thinking that his opponents and their coaches and trainers were his enemies.
References
Heads, P.A; Lawton, J. H. (2 February 1983). "Studies on the Natural Enemy Complex of the Holly Leaf-Miner: The Effects of Scale on the Detection of Aggregative Responses and the Implications for Biological Control". Oikos. 40 (2): 267. Bibcode:1983Oikos..40..267H. doi:10.2307/3544591. JSTOR3544591.