それでもダメならの英語

It is not that, either.

Even if it does not go well, I shall be where I was

I shall lose nothing.

much less

It can't be helped, so

Even if I fail, （I shall be in my original position―の意味にて）I shall be just where I was.

It is no matter if I fail

It does not matter if I fail

I do not care if I fail

Failure is of no consequence.

to have possibility of failing at something

I will answer for my crime with death.

That wouldn't be a problem.

I wouldn't mind.

Not a problem.

No worries.

That's absolutely fine.

Anywhere will be fine.

I don't mind.

See if I care!

I don't care.

If he fails so what?

It is no matter if it is left alone

You may leave it alone.

At all events, I shall not lose much.

An unlucky break cannot be helped.

All my efforts have come to naught.