Is this how you intended Corvette Vs fighter Combat?.

[Nafensoriel]

Agreed with this too, M ships don't have THAT much more shielding than an S ship, and S fighters can certainly have a LOT of forward facing guns. If the M ship is only relying on 2-4 turrets, it should rightly be ripped up by a squadron of S fighters concentrating on it. The M needs to be backed up by its own fighter squadron, or a load of drones/mines etc.

M-class ships in X4 is the step before the destroyers, like the M7 class ships in X3 was the step before the M2..

But the shield and hullpoints are sorely lacking, and in terms of firepower, the M-class ships are left wanting.
Both M, L and XL-class combatships needs ALOT more turrets. A destroyer in X:R had 50+ turrets, and now we're left with 10 .

In X3 you'd think twice before engaging an M6 if you were in a fighter, unless you had missiles.
In X4 killing an M-class ship in a fighter is something i can do with 1 hand - case and point.

In regards to the destroyer turret count. A WW1/2 Era destroyer had considerably more turrets than a modern Arleigh Burk class. Yet an Arleigh Burk alone could probably annihilate all ship-based naval forces in WW2 on its own.
The number of guns is irrelevant compared to the effectiveness of the gun.