Also the only reason I ever wanted to change how attack works is because it so hard to kill anything in this game as it so easy to evade and with likes of large ships with so many hp it almost in impossible to kill them
And I really thinks ships need higher attacks to be able to kill stuff our able to shoot guns and missles etc at once
It seems you're probably doing this bit wrong as well, because it's not hard to kill ships in this game. TIE Fighters can get one-shot as easily as an X-wing can, if the dice are favourable to the attacker and not the defender. And if you don't know what being "one-shot" is, it's when the attacker rolls all hits or crits, and the defender roll blanks, and the resulting hits exceed the shields and hull value effectively destroying the defender on "one-shot". And it does happen.
The attack values don't need to be higher. You can maximise them by utilising target locks and focus tokens. If you're not using target locks or focus tokens during your attacks, then they are going to be less effective. It's all about planning ahead. Target lock a ship, and then next round plan a manoeuvre that gets you in close, and take a focus action when you move. Range 1, a target lock and a focus token can make for a devastating attack.
Go and watch this video and compare it to what you're doing. If you're doing things completely differently, then you're doing things wrong and you need to stop that and read the rules and follow the rules.