As noted above the real culprit here is this ridiculously long reload time.
It should be able to reload extremely fast because it’s a magazine, fed gun, even the belt reload times in the game right now for the tanks are ridiculously long they have no bearing in reality, they’ve done it to neuter them.
The Semovente, Did have a machine gun mounted on the roof but it’s not modeled in game obviously, It is actually extremely effective at killing infantry. You just kind of have to hit one of the guys in the section with the round, and it will kill quite a few of them around it. I used to have some considerable success with it when I used it, the P III sucks balls in NA, the PIIIN Is one of the few premium vehicles that’s worth the money, it’s a very effective vehicle and I have enjoyed using it immensely so if you’re gonna drop any money on the game, I would suggest doing that if you like North Africa. Otherwise, your only real option is the grind until you get the PIV.
As others have said, reduce reload and let M14 use its twin hull MGs.
Also the devs need to replace historically inaccurate long barrel M75 for historically accurate short barrel M75 which has a MG modeled on it; to make it properly compete give it HEAT.