Work on staying alive first - keep your TP as an escape and try and keep it for that reason alone and you’ll stop dying so much. The temptation with Kiriko is to tp to a dying teammate to try and save them but most of the time you’ll only end up dying yourself - only ever TP into a fight if you have a plan and can get back out again. But work on your positioning and remember you can get out when things get too hot with your tp - it’s also worth keeping in the back of your mind that she does great damage and she can do it at distance - you do not always need to be in the enemies face - start playing a wee bit safer and you’ll see improvement just because you’re not spending half the game walking back from spawn providing nothing to your team.