Association Cheaters

[Blast]

I wanted to say "why don't you go f yourself " but you'll misunderstood me,so i won't say anything lol

Really this is the sum total of your intelligence?
The height of your knowledge and learning?
Maybe you should refrain from speaking till you have properly formed a cohesive statement.

Just for your benefit:
'you'll' is short for you will which is future tense, 'misunderstood' is past tense, therefore should not be used in same sentence.
The word you were looking for is 'misunderstand' or alternatively you could use 'you would have' although that implies that I had already read your comment sometime in the past.
'I wanted to say' is redundant as you have and did say it.
'so i won't say anything lol' is redundant and like closing the stable door once the horse has bolted.
Congratulations you got a 'F' in use of English.