No it's not so bad.
You probally just suck at aiming or you used the full auto mode incorrectly.
Simply spraying the entire mag is handicapped when the target is further away than 10 metres.
How the hell could you spray an entire AKM mag and only hit his leg once ?
You should use the full auto mode when a target is like 1-20 metres away. Unless someone stands directly infront of you should never spray the entire magazine at people - try to shoot bursts of 2-5 rounds. Burst fire mode is just for people who have a terrible trigger finger and tend to spray entire magazines instead of firing a burst of 2-5 rounds.
I'm actually really good at aiming, it's just that getting chased by zombies plus running is hard to fully aim at a player who just spawned out of nowhere in the airfield.
And yes he was like 10 meters away.
I wasted the whole mag because the recoil and spread made me shoot way above the target lol, added with no breath
I didn't hit his leg once, was well bleeding and a few shots hit him. He didn't die, thats all.