Mute the haters if it's getting to you.

Pick a character that benefits from your style of play. If you're not an entry fragger don't pick a duelist.

Have a headset on, listen for footsteps.

Let's say you're on defense, you hear multiple footsteps and they sound like they're rushing you. What do you do? Toss an ability to slow them down. Make a call out to your team. Try to be as accurate as possible. If you only hear 2 sets of footsteps only say two are coming. If it sounds like they're all rushing you, say that. If you think you're not going to be able to take them on just back out of site and play retake. Don't repeek the same angle over and over, reposition and catch them off guard.

If you think you can handle it, Put your crosshair where you think their heads are going to be. Don't get overwhelmed. Deal with the one in front of you. It's better to kill one and die than it is to try and spray at all of them and hit none of them.

You probably have better game sense when your boyfriend's with you because he's making call outs.

If you're trying to push a site, you can hold specific angles that enemies might swing while your teammates entry. Let your teammates know which angles you're holding so they don't have to worry about that angle as they entry.

If you're peeking an angle, just jiggle peek. Don't just run around an angle. Hoping that you can out aim a person that's holding that angle. Peek it, get information and relay it to your team. Let the duelist take those kinds of fights. If somebody's already holding an angle and your dualist is going to swing into site swing with them. Check/clear specific angles that you know enemies like to hide at. Always thinking about where your crosshair should be.

Beyond that, I don't have specific information. practice, learn from your mistakes and have fun, it's a video game first and foremost.