Is it better to try and fail at something?

true, because if you don't try it at all you wont ever know the outcome. the outcome can be a success or a fail.

when you don't try at all, it will haunt you, you will aways wonder.

there is a saying: "don't regret what you do. regret what you don't do.

yes, u are a true fail if u give up or quit before even trying