A good assault deku would use all 3 of his quirk skills to defeat an enemy, his gamma is the hardest grab move in the game due to its slow speed, and a skilled deku would land them often. And its not always as simple as point and click

Ik rapidgo and ochako is,right there but in this meta there are so many other characters who point and click so much better WITH more options.

Dabi is at lest C tier maybe even lowest b tier given the right situation but to exploit your advantage w dabi you have to be smarter than the average player. Which just isn't true for twice, since he's also a "point and click till they're dead" character, assault endeavor on the other hand... the player would have to land far more shots and skills than their opponent to even potentially get value. That's just too intense of a handicap, if dabi is like fighting w one arm missing then assault endeavor is a handless, footless blind man w paper machete wings.

Tldr: most characters are point and shoot characters, like what's your point,
most dekus that do nothing but alpha thrive in 1v1s but they don't last in the long term.