Well her heroes are heroic and her bad guys are evil or weak — much like superhero films and comics, which are extremely popular and not criticised for the same

Well her heroes are heroic and her bad guys are evil or weak — much like superhero films and comics, which are extremely popular and not criticised for the same thing. But there are interesting characters in her novels that are heroic but undone by their flaws. E.g. Leo Kovalensky and Andrei Taganov in We The Living, Gail Wynand in The Fountainhead, Dr. Robert Stadler and perhaps Eddie Willers in Atlas Shrugged.