An example explaining why this movie is very bad written

Rating: 3/10 (12 November 2019)

My native language is not English so I am sorry if I say things in not natural ways. But I hope you can understand my example.
This movie is not just overrated. It's actually really bad movie. The events in the movie are so made up. For example. That show on TV. It would not happen that they would take a video with an obviously sick laughing psycho to the show to make a humiliating jokes on him. He is not famous, no one knows him. TV takes trending stuff with buzz around. There was no any reason for them to show that. It also doesn't seems like the kind of show where they ridicule people. So this is very made up from all angles. Then they invite the psycho to the show. And of course those people working on such shows are not new born kids. There are a lot of experienced people who've seen a lot. They would know that psycho guy can be dangerous. But there was not a single security steps taken. They just allowed him to walk in and do whatever he wants. This is very made up. And this would not happen anyway. Because really they would first check if he is even sane enough to be invited to she show. And the records would show he is sick. And any doctor would tell them, "well, this guy is not sane so I would not recommend to invite him". Tho it is quite obvious even without doctor's consultation. So even if somehow they would invite him, they would take security steps. And would find out the gun. But they didn't. Why? Because it's all made up. Bad script. Also the TV show host would not be so naive and silly to start trolling and provoking a psycho. So this whole episode again all made up from all angles.
The whole movie consists of such made up events and things. Who wrote them? I'd say some amateur person who actually do not understand much about human behavior and how things happen in real. Sadly a lot of the movies today are written as poorly as this. Because people consume this and don't ask for something better.
Made up events is not the only thing I would blame the movie for. But this was more easy to describe.