Ovinomancer
No flips for you!
This isn't a 5e problem -- it's a game goals mismatch between players. This is a problem if the game is 5e or Monopoly.That's one way, or if the players obsessively retreat and rest and so on unless prepped (DMs can fight this with clocks etc. but there are limits and ultimately if the players play this way and the DM is having to throw clocks at them to stop them, probably you need a different DM or different players).