Space battles never seemed believable to me. Fun and good looking, but not credible. Engagement distances are ridiculous. Missles have to be accelerated to extreme velocities and launched in swarms if they want to have a chance to escape defensive laser systems, which requires a decent acceleration run. Lasers beams lose coherence with distance, that's true, but not in a few kilometers in space. Stuff like AA guns seem a bit absurd as long has you have laser beams. Just small, numerous and fast to charge and to dissipate heat ones for "close" incoming threats interception, and large ones with insane capacitors to blow massive threats at hundreds or thousands of kilometers.
And don't ask me how magnetic shields are supposed to deflect laser beams, or why warships would stick together in stupidly dense formations (so that, even the enemy laser beams miss, which seems unlikely as they travel to lightspeed, there is a good chance that another ship would be hit, and if its propulsion is damaged, there is a good chance it will run in another warship and give a double kill for free). The only good reason to group warships is to concentrate firepower and overhelm enemy defenses, and that can be done with intervals of dozens or hundreds of kilometers.
Spacefighters are flying coffins if manned. Drones seem a better idea, sent in huge swarms to overhelm the enemy defense. But that could be cheap, conventional missles instead, hardly makes a difference.