What do you do when you have no self-esteem at all because you are not intelligent and you make tons of mistakes in everything you say or do?

Accept it. Be aware that high self-esteem/ confidence is an illusion. Everyone is self-conscious it's just they use a mask very effectively. Self-conscious has to do with evolution. We are evolved to tribe mentality so not fitting in or being accepted by the tribe = death and this has been breed into us so we all have it it's just others are better at hiding it. Don't buy into that think happy thoughts or just don't think about it. Happy thoughts doesn't work definitely not long term anyway and not thinking about it doesn't work at all. If I told you that whatever you do don't think about cigarettes for 60sec what are you going to think about? try it and see? Best way to deal with negative thought is to allow them and not focus on them as much by allowing thing in the background. Don't fight them because this just makes them worse. try techniques like when your having a negative thought say thanks brain or it's the .....(eg can't do it) story again which helps to lessens it's seriousness.

You have a fair amount of all of it, like the rest of us, and there are times when we use it more than others, but it's there all the same. You'll be fine, and its hard times for a lot of people these days, and its up to each of us to keep working on it, and not let it get you down.

usually when people are like that, they become feminists

but if you are not intelligent, and know you are not intelligent - then you are better off already; they don't even know that much

You're not gonna get good at something unless you devote time to it. It falls on you to become who you want to become and not on anyone else.

We don't rise to the level of our expectations, we fall to the level of our training.

Find something that you love, and become obsessed...