high skill and normal skill are worlds apart. high kda doesn't help as much as you think and you don't become high skill over night.
Keep winning with high kda and eventually you'll get there.
Also notice how in games that have 'unknown skill' (they usually contain players of higher skill) your KDa drops noticably. Try to keep a good KDA and win even if it's harder (try at least 4 kda and win) and you should eventually get there.
Just some insight I'm trying to follow myself (not on this account)
კომენტარი შეიცვალა
კომენტარის დასაწერად გაიარეთ ავტორიზაცია.
I have winning all my games with good kda but I am still placed in normal skill