Even if in early games she had big breasts, women have those naturally so not sure what the problem is here, but you can't say a girl that dual wields guns, went against bears and wolves and tigers, solved crazy puzzles is a sexy fantasy just because of how she looks. That IS sexist and it's actually demeaning women.In the original games, Lara Croft was designed with huge boobs.
In the new reboot, Lara Croft constantly moans suggestively and there's a near-rape scene and the devs claimed they want the player to "protect her" (as opposed to the player being her).
That's definitely more sexy fantasy than power fantasy to me.
Most feminists don't realize they're more for controlling women than letting them be free to represent themselves how they want.