Personal experience

oops mispelled aerospray im a failure to humanity

Dude aerosprays are so weak when it comes to combat.
I slowly ran over a team of 3 aerosprays as they tried to shoot me FIVE TIMES.

read. the. title.

Im just telling you my experience!

I used the areospray like a drumshotgun and it worked

I mained the aerospray in s2 and I was a pretty good player, I think the aerospray was nerfed in s3

I like 3's aero better than 2's

It has pretty bad accuracy in 3, and thus opponents take less damage from it then in 2

Aerospray is an interesting weapon
When paired with the right sub/special, it can be devastating
An aerospray is more of a turf weapon than a PVP weapon, hence why fire rate is high but damage is low.
Some aerosprays (such as S2's aerospray pg or s3's aerospray mg) has an emergency button (the booyah bomb or reefslider), which lets the player get out of sticky situations (I mained this in s2), they got to know how the special works (like reefslider you need to time it right, or booyah bomb if the opponent's weapon does moderate damage the shield can break)