Idiom/saying for "there was no possible better solution at the time"

Solution 1:

Make do comes to mind:

• Manage with the limited or inadequate means available. (ODO)

• We had to make do with the solutions we could offer at that time.

Solution 2:

Sometimes, you just gotta play the hand you're dealt

To accept, deal with, and make the most of one's current situation or circumstances; to make use of that which one is afforded or has available. I know you feel unsatisfied with your life at the moment, but we all have to play the hand we're dealt. Just keep working hard and things are bound to improve! I never asked to be responsible for the business, but I'm going to play the hand I was dealt.

play the hand you're dealt. (n.d.) Farlex Dictionary of Idioms. (2015). Retrieved July 18 2016 from http://idioms.thefreedictionary.com/play+the+hand+you%27re+dealt