People can dislike it to their content, but many of the things I see people stating are just factually wrong.
And sure, on average males have a physical advantage. But really, a lot of women are plenty capable of physicality. And again, if we are talking realism in our action films, then on average a 50-60 year old ageing male is not going to do much either. People don't seem to have a problem with that.
Predator kills everyone in less than a second, but the many opportunities that he had to kill the girl.. well.. I guess you can't kill the main character, right?
The film clearly establishes the Predator not interested in prey. All the men are hunters with weapons. The girl is prey throughout most of the film, at least at the moments she encounters the Predator. Just like the bunny and the wolf early in the film, the Predator is not going after the bunny. Their first encounter is her helplessly trapped and nearly killed a bear, with the Predator ending up saving her in a way. Second time she is captured by her tribe, with her hands tied. When she escapes and has the chance to attack, she flees and get's again helplessly caught in a trap. Then later she is tied to a tree.
It think this film is well above average in terms of script, as most scenes serve a purpose and come back into play later. All without explicitly telling you, mostly showing you.