most mistakes of traders are;
* Thinking it's a get rich quick scheme or thinking that it's easy.
* Having no proper training in the craft to attain knowledge about it.
* Watching one two or three video's on YouTube by one YouTube influencer and think they are ready for it or thinking they have known the craft.
* Having no experience traders that is good in the craft to guide them.
Everyone wants to achieve wealth in trading but unfortunately only a small number of people succeed because it is not easy to achieve success in trading. The mistakes of traders are quite illustrated in the points you convey and are most experienced by some traders because they are too focused on the success described by others. But the fact is they do not understand the impact of the risks because they do not do research before getting involved further in it.
This is the problem that occurs because people's habits cannot see the success of others and they think they can repeat that success in an easy way. Most traders fail at the beginning but some of them learn from their mistakes and try to make changes and some others quit.