You did your best, that is what matter.
Do what it takes to achieve the peace of mind and satisfaction of having the knowledge that you did the best you could. Your effort need a result, not a result that fulfills your expectations. If the result is good, continue that you do what you do. If the result is not what you wanted, try again if you still want it or let it go.
Let go when you have given your fullest and never when you done something half-heartedly. It will haunt you, tease you and destroy you by constantly asking you: What if?