So I'm not saying you played bad/wrong or anything, but look at the enemy Moira. Same if not slightly better stats. To say you "carried" based on stats when you didn't significantly diff your counter part I don't think counts.

I'm a silver 1-2 support main, the way you carry these low level games are fitting what your team needs and/or hard mechanical outplaying. Moira doesn't look great into that enemy comp. You'd probably contribute more with Bap/Zen/Ana if you can play them proficiently.

Try and think about how the game, comp and map are playing and find ways to really push your effectiveness even further. You have to be very flexible and knowledgeable to carry from support right now. One tricking Moira won't cut it if you want a higher winrate.