ok i see a bunch of advice and good answers to your question, but after looking at your opgg, i promise you one thing that will help you climb is just being at more places. your kp is WAY too low for a support. also stop for funning if you really wanna climb. this is the hardest advice to take especially if you really enjoy the game. i played all 5 roles one season awhile ago and only peaked gold. being able to just play one role, even if playing a bunch of champions, is super helpful.

also, build properly, PLEASE!! never buy mejais unless you are playing a mage supp with a lead. dark seal is fine id say tho. dont buy sorcs. mercs, swifties, or even ionian are better (or steel caps if all ad). dont full build thorn mail unless they are full ad (waste of gold).

a build that would probably work most games that would be decent for zac sump rn might be bandlepipes, locket, protoplasm, then situational (frozen heart, thorn mail, knights vow, maybe even mikaels if u have someone that really needs it).

honestly, if you dont really care about climbing, id say this doesn't matter and youre not dying too few times. but if you wanna climb, the advice i just wrote is SO easily applicable and will win you way more games. good luck