I have just being sorting a few of my worst pictures from Sharm last feb.
I was going to delete this but had a very quick play in PS, I only moved the sliders in levels & applied the unsharp mask, Here is a before and after, should I still delete ?
The eye is yours. Do you like it and what are you going to do with it? If you just want to keep it on the computer then I think you will be okay. But because you have moved the sliders around so much, I think if you try to print it, the colours will go to r*tshit. Look at the histogram and see how much information you have lost.