My friend is new to this game as well as PC FPS games in general. His aim is terrible. From his point of view, the main key to winning games is not getting kills, but gadget usage. And that's where the problem arises.

I want to preface by saying that my friend isn't like this in real life, he is just extremely competitive when it comes to games. Especially Valorant.

The problem isn't that he sucks though. It's that I get flamed by him every game. It's very common for us to lose the game with me having around 30 kills and him having one-digit kills.

I'm a more casual player when I play with him, but I can still have no issue tripling his kills (I used to play a lot of CS:GO). I don't watch any videos or anything about this game, so I know nothing about meta gadget usage or anything. It's just for fun for me. What isn't fun is getting ripped a new one every game for what seems like no reason to me.

The main reason he insults me is because I "don't know how to use gadgets correctly". I never really care too much about the proper way to use them anyways if I can just run around killing everyone just as easily without them. But back to that previous example where we lost and I had 30 kills and he had 9, he would blame the fact that I picked KAY/O because he sucks and offers nothing to the team.

I've tried explaining to him that in order to solve the problem he has with me, he should look inwards instead. There's a reason he's in Bronze 1 (Bottom 10% of players) after all, right? Nah. The reason is his teammates and me not knowing how to use their gadgets to help him. I've explained to him that a player with good enough aim will be able to rank up on their own. But he's too busy believing that all his Sova arrow lineups alone should deserve him Gold 3.

To him, aim doesn't matter if you know how to use gadgets correctly, which doesn't make sense to me if the enemy team needs to die for you to win.

I've had countless discussions/arguments with him about this, but it seems impossible for him to view the game in terms of what HE should do differently, and not everyone else. What is a good way to put this in words for him to understand, or should I stop trying to argue with him altogether?

TLDR: Friend (Bronze) insults me (Diamond) because it's my fault we lose the games where I triple his kills because I didn't use gadgets well enough to help him. He doesn't believe that kills are what matter in the end (In a 5v5 shooter), but instead thinks that gadget usage is the ultimate decider of someone's rank. Is there a good way to discuss this with him, or should I just not even bother?

Edit: You guys will be surprised to find out that even after showing him this post and having him read through the comments, he still tried to argue every point for the next couple of hours. I eventually couldn't take it anymore and just left the call.