You can’t win them all

(you) can't win them all

A phrase said, often as an attempt at consolation, when one has lost or failed to achieve a desired result, especially after previous success. "Them" is sometimes abbreviated as "'em." I know you're disappointed to have the lost the game, but you can't win them all, honey. A: "I'm sorry, I know you worked really hard and were expecting an A+." B: "Eh, can't win 'em all."
See also: all, win
Farlex Dictionary of Idioms.

You can’t win them all

and You can’t win ’em all
sent. No one succeeds all the time. (Said when someone fails.) Don’t fret about it, Tom. You can’t win them all.
See also: all, win
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • (you) can't win them all
  • can’t win em all
  • can’t win them all
  • can't win them all
  • You can’t win ’em all
  • you can't win 'em all
  • you can't win them all
  • (something) isn't everything
  • money, winning, etc. isn't everything
  • winning isn't everything