I disagree with you completely. I consistently get 3-5 *** units.
Its about managing the cards you're dealt instead of trying to force a comp. Early on you should be re-rolling like crazy trying to get ** and *** units. Probably up until Kruggs, maybe even a little after Kruggs if you're getting unlucky.
But then you just chill. Let your economy build up to 50. Then you can easily get 3-4 FREE rerolls per round, and you'll just be able to coast off of that for the rest of the game as long as you don't drop your economy below 50.
Then if you ever get down below like 30 health, you just dump everything and hope for the best.
You should never go into a game like "I'm gonna do wild/brawlers this game!"
You're shooting yourself in the foot if you do that.
Go find a tier list, tftactics.gg has a good one -- and figure out which 1g and 2g champs are individually strong. Try to get those champs early. Whichever ones you're able to make into ** and *** -- THATS what you build your comp around. Did you get a Lucian? Maybe you can try Noble, Gunslinger. Did you get a Nidalee and a Warwick? Try doing brawlers and shapeshifters, or maybe try to complete the wild bonus.
But never go into a game saying "I'm doing demon shapeshifters this game!" Because then you'll zero in on that, and you'll literally be throwing entire viable team comps in the garbage for no reason -- and you'll end up finishing the game with zero *** units like in the photo above. Because you re-rolled them all looking for this one specific comp.