You wish to climb up from ELO hell(Bronze)? Pick Malphite only.

Mlaphite on NA/bronze got the highest winrate currently. Pick him only if you want to win the majority of your games.

If you want to climb up from ELO hell so hard, pick Malphite top. If top is taken, go jungle or mid. I never tried Malphite support yet since i prefer to pick Nautilus.

As malphite, you are the leader. Players will follow your call if you're smart and good. You can initiate the enemies who constantly clump-up together. Then, you can deal as much AOE damage as possible while your team can clean up the rest. Bait your enemies at the baron. Ask your teamates to hide in the bush. Wait for them to come and Genocide! Take the Baron and finish the game.

If you take Teleport, as soon as you hit level 6, port on a ward hidden in a bush and ult both the ADC and supp and let your own ADC eat.

Do not be afraid to be counter-picked. In bronze it does not matter if you do because you're supposed to be better than them as a player. If not, then you deserve to stay in bronze to learn how to play and to be above all these bronze players.

You got too much AP already? No worries, build AD Malphite. AD malphite is even better against clumped-up enemies. Having too much tanks in the team already should be the only exception for not picking up malphite, but that's also why you need to let your team know that you will tank and initiate.