Quick question

So I just started - I have plenty of experience with mobas but not wild rift or LOL. I have about a hundred or so games in as a support - occasionally it sticks me in a non-preferred role so I just do what I can. I don't know the itemization yet at all, so I just grab the recommended kit.

I just got stuck with mid (my first time playing mid in this game) so I took karma and grabbed a recommended kit. It gave me sickle and my teammates immediately spent the first 10 minutes crying about how I was a troll and ruining the game. Can someone explain to me why this is wrong and why the game is recommending bad items? This is a top ranked loadout I picked because it had early boots and I wanted to be able to cover side lanes earlier.