So poorly written.. what a shame

Rating: 2/10 (5 May 2019)

I saw it when it came out and was so disappointed then, then I watched it again shortly thereafter and felt the same.
Now it's been about 7 years since and I decided to watch it again to see if I still feel the same. Unfortunately I do. How do you write characters that are supposed to be super smart, but yet behave so stupid?
Some examples:
1. They land on an alien planet they know nothing about about. Someone has a defensive weapon before they set foot on the planet, but the genius Noomi tells him no, they don't need weapons. What? Just idiotic.
2. David is a robot and doesn't breathe, but yet he wears a helmet with oxygen, and when someone points it out, his answer is "humans prefer to be around other humans (paraphrasing)." What? Made no sense.
3. The crew members took on this assignment to make money, but had no idea what it was? Right, people join a space mission without asking the basic questions.
4. They encounter bizarre and possibly hostile creatures and decide it's a good idea to touch them and play with them, not knowing what the hell it is.
5. Two are left behind and are scared to death, but somehow the captain just cuts their video feed and tells them goodnight. Instead of either helping them of monitoring what is happening to them.
5. The amount of times they are so eager to confront the unknown, even after they have been attacked it just astounding.
6. Ridley set up this story to continue, but decided not to continue it or ever explain any of it.
Just so irritating how bad the writing was and how it got approved to be made. Ridley should be better than that.