Why is Javascript terrible?

Not a troll thread - yeah, I know, what a surprise! I've done some quick googling and most of what I read was that Javascript was/is a horrible kludge and should have never existed. I haven't done any real work with the language, and regardless of what is said, I'll probably check it out. However, I wanted some opinions on it, such as what could have been improved in the language, any design flaws, what I should look out for (any brain-damaging 'gotchas') while learning, etc.

Thanks /progologologloglogloglogloglo

I've done some quick googling and most of what I read was that Javascript was/is a horrible kludge and should have never existed. I haven't done any real work with the language
However, I wanted some opinions on it, such as what could have been improved in the language, any design flaws
Why don't you use it and see for yourself? Or does the extent of your programming knowledge consist of repeating the opinions of other people because you think it makes you sound smart?