Randoms getting you down? Don't know what Deck to take? Try something non-specific! Be adequate, at a range of things!
Two is one, so you can fill two weapon roles! Economy/Scav cards to help support the team, speaking of support, use poultice for extra healing, as well as surplus pouches to aid in the teams nade capacity, and other cards that are generic enough to be good but not great because you aren't stacking an exact build
If any cards are to be replaced, I would recommend removing poultice, heavy hitter (used for stunlocking and common clearing), fleet of foot, or scar tissue.
Other good generic cards are Avenge the Fallen and Inspiring Sacrifice, any team effect card, Experienced EMT, confident killer, second chance or life insurance, hellfire, Broadside, Down in Front, bullet damage cards, Motorcycle Jacket or Padded Suit, Ammo Capacity cards.
Remember, when staying generic, don't pick cards that disable slots or other features, as that means you have to build into something to either fix it or enhance it. Keep yourself average! No one will particularly like or dislike that.