Fan is short for Fanatic.
fa·nat·ic
fu0259u02c8nadik/
noun
a person filled with excessive and single-minded zeal.
synonyms: zealot, extremist, militant, dogmatist, devotee, adherent; More
adjective
filled with or expressing excessive zeal.”his fanatic energy”
Fans of all teams in the NFL debate about their players all the time. Some converse with blinders on, and use blind-homerism as their point of contention. Most fans over-value their own players; this is common given the nature of their fandom.
What do many fans not like to hear?