Real life carriers on the seas are OP, or at least they were in WWII. Carriers and fighters in space would probably be an extremely bad and wasteful idea. There's almost no space to hide in space, it's 3d, high speed ballistic loads or lasers could target objects from insane lengths away. Not much reason to put a person into a ballistic load. Weaponry would probably be massive in weight and size to target such long ranges.
Stellaris fleet combat is a bit more based on Earth naval warfare, than it would be on space warfare. This is ok, because it looks nice and recognizable. But this doesn't mean fighters should be as powerful in Stellaris as they would be in real life on the seas. They should be better than they are now though.
Stellaris fleet combat is a bit more based on Earth naval warfare, than it would be on space warfare. This is ok, because it looks nice and recognizable. But this doesn't mean fighters should be as powerful in Stellaris as they would be in real life on the seas. They should be better than they are now though.