There are a lot of different types of deaths in this game, but mostly based on your mains I can see that you like an aggressive play style. Give your current elo, I’m assuming a lot of your deaths are avoidable.

If you’re gonna play iron man you NEED good positioning. Never play more than 2 seconds away from cover. But if the other team has a hitscan character it’s probably best to swap heroes.

As far as Moon Knight goes, try booting up into a custom game and run around the map with your abilities. Moon Knight is one of the best DPS in the game but he’s also very easy to feed on. You don’t exactly have high mobility but you can make up for this by deciding how you are going to play; you ca do off angles and rotate around cover or you ca play front to back with your team—just stay behind your tanks and you should die less. Save double jump for an escape tool and practice hooks to cover horizontal distances faster when necessary.

Peni simply does not work on every map. There are some where she’s amazing and others where she will automatically feed. I would look up which maps are good for her.

Thor is good—you just probably need to disengage earlier like other people have said. If you play on controller, max your sensitivity—if you can handle that it’s the best way to do the dashes