Why do I always think everything I do is wrong?

You can not trust yourself. You can not believe yourself. You think that you can not do anything but that is wrong! If you want to, then you can do.

Lack of self esteem can cause us to put ourselves down. Work on self confidence, believe in yourself and your choices.

Insecurity and self-judgement are common things. You can help it by working against it. Always remind yourself of helpful and good things you've done, and encourage yourself while taking actions : "I am helpful! I can do this! I know what I am doing." It is also important to realize that in our crazy world, no one really knows what they're doing. ;).

Maybe you doesn't do it wrong. Why do you think so? You're beautiful at your own way. Maybe you didn't find people who treat you nice and respectful.

You think like that because you have low self esteem. If you consider your decisions/actions as wrong, you are often regretting them. Having regrets shows that you aren’t happy with the outcome of your life. In fact, there is no right or wrong decision. Well, society tells us which decision is the most and least appropriate one. And society judges hard if you decide against it’s rules. But in the end we are our decisions. You did nothing wrong. You did it right because in the moment in which you had the power to decide it felt right. So you don’t have to regret or overthink that. That decision made you who you are today.

there are many reasons. the most common is lack confidence and always comparing yourself to others. please be confident with yourself, don't think you're wrong because you're doing something different from others. you are you and they are not you or otherwise. cut your negative thoughts. not everything you think you're doing is wrong, you know :)

because you put so much pressure on yourself you gotta give yourself credit the things that you do at your best

This might be because of pressure put on you by other people, probably people you admire or care about. It could also be due to pressure you've put on yourself. Remember that your mistakes do not define you. You are a good person, and you do good things. You do things right so many times, but because of this pressure and/or anxiety, you pay attention only to the things you've done wrong.

Maybe you're burdening yourself to be completely perfect? that's why you compare the things you do and think that what you do is wrong.. nothing is wrong or right.. just the choices are wrong sometimes.. And if sometime you make any mistake, its okay for the first time.. just don't make it a habit. Try to improve yourself.. without expecting too much.. you're not here to judge anyone, not even yourself. Make your best mistakes, we are here for making mistakes.. to learn.. and to move on.

Because you aren't really self confident, I suggest to take a 7cups self - confident path. Also, you should be more positive, there's no point to think that whatever you do is wrong...