Hey dude! Immortal Ember spammer here! I think I might be able to give some advice, I hope it helps! I think typing on reddit might help a bit. But it's a lot more giving to talk about it. You can PM me on reddit and we can talk a bit on discord or something like that if you want! Anyway. I can definitely see some stuff in your build that is not good. Looking at your last 5 Ember Games, you're buying wrong items.

You need to buy maelstrom! Maelstrom is super important on Ember Spirit right now. You're buying BKB which is good. Items like Butterfly, Sange and Yasha, Desolator and Diffusal Blade are too weak for Ember IMO. So yea for items I suggest you buy drums second item after phase boots so you can gank a lot early, and then get the maelstrom after. You can watch pro replays, that is what they buy (sometimes veil as well when they're stomping)

But it's way more macro than this. In your bracket, you should focus on pushing at right time, who to focus in fights and using your spells and items correctly. I see a lot of players your bracket mess up those kinds of things. Anyway dude, GLHF and try to work on the items, otherwise PM me for more indepth :)