system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Why does Matt Murdock choose the persona of "Daredevil" ?

How'd he'd get that name ? Why doe she decide to dress up like the devil,Especially if he's a raised Catholic ? Is it the "Criminals are a superstitious cowardly lot" reason ? Hell,he should just call himself "BatMan" since he uses sonar and is blind, Just like a bat...
gpt
There are four overarching reasons; the fist two were developed more in the Netflix series, the third is canon across iterations, and the fourth is still, IIRC, canon in the comics.

First, his father, Battlin' Jack Murdock, was a boxer. He was strictly a journeyman, basically paid to get beaten up by other people. But every once in a while, something would snap in him, and he would "let the Devil out." He would almost go into a battle trance, and just stalk toward his opponent, not even defending himself, just dealing out punishment. Jack did this during a fight he was paid to throw, and was murdered as a result. Matt blamed himself for this, and when Matt became a vigilante, he patterned his costume after his father's ring attire; that's the reason his original design was yellow with red accents.

Second, the media gave him the nickname "the Devil of Hell's Kitchen." This was combined with his fearlessness - Matt is often tagged "the Man Without Fear" - to become Daredevil. Matt's courage is one of the cornerstones of his character. His willingness to throw himself against impossible odds borders on the reckless.

Third, Matt is an old school Catholic, and carries a ton of Catholic guilt around. He is absolutely filled with rage, the living embodiment of wrath, and *that* is one of the deadly sins. To Matt, his career as a costumed crime fighter is simply the least sinful outlet for his anger. Matt considers himself unworthy, more a child of the Devil than the Angels. His costumed identity reflects that.

Fourth, "Daredevil" was a pejorative nickname some bullies gave him in grade school. His was bookish even before his accident, and the bullies made fun of him for being a weakling.