This was in a high diamond lobby, 2 healer team with Rocket. The thing you need to be doing as Adam to win more is switching off of him. He's excellent and one of my very favorite parts of the game, but he simply will not work on certain teams. I don't mean he only plays well with certain characters and comps, I just mean the actual players. It can be slow or it can be fast, but the team has to be on a similar tempo to itself and they have to establish an idea of a frontline to fight on or behind. If you die once or twice without getting that vibe from your team, just switch. You aren't going to be able to wrangle those cats. You can still win, you shouldn't flame your team, but either pick a different healer or trade roles with someone.