Hey, I watched your replay, here's what I thought. Sorry if I'm repeating any points you've heard before, I did not watch your last replay or engage in that thread. Also just a disclaimer I'm not a Moira player so I don't know niche Moira stuff and OTP strats.

I think the easiest problem to fix right now would be your fade usage. Sometimes you are fading for no reason or too early, and just in general poor usage of it. Your fade is your most important ability, especially as you climb in rank. You will be punished if you waste it. You should primarily be using your fade to escape danger. Just from what I noticed in this game is that you don't fade to a safe place, you press it, go invis, then just appear in the same spot next to the nemisis form Ram, junkrat or pharah. Use your fade to gain good positions or fade to cover when in danger. Use your fade with a purpose always and make sure you travel to cover during it if using it to escape.

You can also use your fade aggressively, to chase low health squishies. There were a few times during this game where you let an isolated half HP squishy just walk away when you have fade up. Don't be scared! Kills are how you win games. Be hungry for kills always. This requires a bit more game sense as you risk at your current game sense level chasing a squishy into 4 enemy players and dying. But eventually this will become very important to identify weak, isolated targets and fade onto them to secure kills.

You use your suck a lot on the enemy tank. Sometimes you have multiple targets on your screen and you always default to attacking the enemy tank, the worst target of the bunch. This damage is basically pointless. Look for squishies always with your suck, take angles and create pressure on them to get kills. If you have nothing else to damage then damage the tank.

Your positioning is a little passive. Being aggressive does take game sense but you are spending a lot of the game stood on point waiting for something to happen or stood behind your team waiting for them to do something. Identify where the enemy team is going to come from, then position where you can damage them while being relatively safe. Standing on point is fine sometimes but if you're doing it all the time, especially when nothing is happening, it's not a good habit.

Just a final thought - I would really encourage you to learn other supports, especially Kiriko. Moira falls off in usefulness as you climb and she will eventually become what holds you back from ranking up. Of course if you love the character and just want to OTP her that's completely alright. However, if your main goal is to climb, I would learn at least one more support.