Help me win an argument, or help me realize I'm wrong.

I play with two of my IRL friends. My friend that introduced me to this game is the person in question here. I feel that he's played so many hours with bad habits and is holding himself/the team back. He thinks our other friend and I are the ones holding the team back.

We all got in to a pretty heated argument last night after getting steam rolled in our bronze lobbies for 3 hours straight. I was told to "ask any Finals players with a brain" so that's what I'm doing. I will be showing him this post and all comments.

Here's the gist of it. For the last two seasons we have really struggled in ranked as a team. My other friend and I really focus on teamwork and stick with each other. The friend in question seems to always be off by himself "taking angles". We keep telling him that if we aren't all grouped up together it'll end up being 2v3 or 1v3. He thinks that being grouped up together makes us an "easy wipe".

Last night I kept insisting that we would perform infinitely better as a team if we just simply moved as a unit and supported each other. That's when the argument started and he blamed our load outs, and told me to "ask any Finals player with a brain and they'll tell you that our load outs are trash". I told him he's legitimately delusional if he thinks he's right, but maybe I'm delusional. We aren't trying to be pros and don't really care a whole lot about what rank we end up at but we do enjoy winning and doing good. So here's our load outs, tell me who's wrong and help us end the bickering.

Me (Heavy): Shak, Mesh or Winch, RPG, Dome, C4. I am pretty much always positive K/D at the end of the match, and usually have the highest objective score. My tactic is defend our cash, pick off enemies, and soak up damage. Pretty much a stereotypical tank role.

Friend 1 (Light): V9S, Cloak, Infuser, Gateway, Sonar. He sticks with me, uses his sonars so we know where people are coming from, moves the money/team around with the gateway, and blasts us with health during fights. He rarely dies and does the bulk of reviving.

Friend 2 (The one in question) plays light and medium.

Friend 2 (Medium): FCAR, Turret, Pyro Grenade, Glitch Trap, Zipline.

Friend 2 (Light): ARN, Grapple, Pyro Grenade, Frag Grenade, Vanish Bomb.

The main topic of our argument last night was that Friend 1 and I feel that Friend 2's load outs have nothing that is good for supporting the team or defense which makes him pretty useless for securing objectives or sustained fighting. He says that our load outs aren't good and are the reason we don't perform well.

Like I said we aren't pros, and aren't trying to hit ruby. We would be stoked with hitting Plat 1, and we did barely touch plat last season. I'm mainly making this post because My friend and I think he's out of touch but I'm totally open to hearing that I'm in the wrong here. lay it on us.