Items Aren't The Problem
Want an unpopular opinion?:
items aren't the problem with LoL.
Since the "New Team," which I only call them because they aren't the original - they've been around longer than the original team had been - took over the design department the consistent answer they've given for a progressively worsening Meta is Items.
They've removed items, reworked items, and changed item mechanics. They've added more than a dozen items, reworked those items, nerfed or buffed those items. They've installed entirely new mechanics for items to work around.
It's never helped. It never will. The problem is Champion Design Philosophy, and it will never change. You can see it in the credits, the pet champions of various designers. Items? Just have a bland team credit.