I think a big part of the problem with perceived class balance is that:

(1) Larian seems to have designed the game around Sun Tzu, putting your effort in BEFORE you initiate combat

(2) Fighters are the most resistant class to this design philosophy as they have the simplest play style of -walk through front door, punch enemy in face, action surge, punch enemy in face again, shove enemy into fireplace

(3) a lot of modern gamers don't want to have to think too hard, but also see plain fighters as boring

N.B.

"I don't give a damn about some fanboy obsession with a tabletop's ruleset."

...in a forum for a DnD CRPG...

...that isn't finished...