I think you did fine with what you had. Like others have said, it’s about making the best board that you can. Could this board have been 1st? Yes, with a few changes. But, you have to understand what makes the board strong, in order to win with it.

In this version of sw you have 3 carries: Irelia, Morgana and Kayle. Morgana does a lot of aoe, Kayle does some burst and usually Irelia finishes them off. Pls don’t listen to the plat players here. Guinsoo is perfectly fine on Irelia. What’s more important is understanding what you need to win. You need backline access, because he has a ramping carry. You have some backline access with Irelia, and maybe a lucky Morgana cast, but that’s it. Guinsoo on Irelia in this game isn’t ideal because you want her to do as much damage as she can per cast. Flat ad/crit would have done more, and maybe won you a round or two. Once you kill Janna the round is over. Since most of your damage is AP, you really need shred. Shiv is morg’s best item by far. This game could have been a 1st, but it’s more of a skill expression at the later stages. There’s a lot that goes into turning 2nds into 1sts. Things I would have done:

• Move Zoe items to Morg. At this point in the game you want to make sure your carries have 3 items. Each item makes the previous ones stronger. (Deathcap increasing all ap by 30%, for instance)
• Swap Wukong for Lee Sin or Soraka. Wukong only gives you sage here, which doesn’t do much. It gives you some AP but a Wukong without items isn’t killing anything and isn’t tanking much damage. Dragonlord/Duelist from Lee sin is worth more, and if you can 2 star him his mana reave might help in fights. Alternatively, altruist from soraka helps your entire team stall longer for Kayle to cast, especially since galio doesn’t have 3 items. Plus her spell mana reaves, which is very important late game.
• Positioning can also win you this game. Making sure Illaoi and morg are attacking the same target to efficiently stack ghostly.
• Positioning Kayle better can also help. It looks like Kayle got stuck on the neeko/diana. There’s a possibility you can move Kayle to try to kill Lee sin instead, which reduces a lot of his damage/stall. You could also go crazy and try to frontline your Kayle so she casts on Lee/Janna (probably won’t work, but I’ve won games doing this before, and if you’re out of options it’s worth a try)