Iron Man's armored suit, flight, and energy weapons completely outclass Daredevil's street-level abilities.
Daredevil is one of Marvel's finest fighters, but Iron Man's technology puts them in completely different weight classes. Tony's armor grants superhuman strength, flight, energy weapons, and durability that Daredevil's billy clubs and fists simply cannot affect.
Daredevil's radar sense would give him perfect awareness of Iron Man's movements and attacks, but sensing a repulsor blast does not help when you cannot survive it. Matt's martial arts are useless against an opponent encased in armor that can withstand tank shells.
Matt's only chance would be an EMP or similar tech-disabling device, but Iron Man's suits have been hardened against EMPs for years. Tony's AI would identify Daredevil's radar sense and could potentially counter it with sensor jamming. The technology gap is simply too wide.
Daredevil's radar sense provides complete awareness of Iron Man's movements and attacks. His tenacity and martial arts mastery could potentially find gaps in the armor's coverage in close combat.
Iron Man's suit provides flight, energy weapons, superhuman strength, and durability that Daredevil cannot affect. Tony can fight from range where Matt has no viable offense, and the suit's sensors counter stealth.
Iron Man wins decisively through technological superiority. Daredevil is an incredible fighter, but a peak-human martial artist cannot defeat an armored flying opponent with energy weapons.
Daredevil also fights
Iron Man also fights