I used to be a Jinx main, I am now a Jhin main. I am somewhere between mid bronze and low silver. I am far from great, but I know this style of champ well. Here's how I deal with that:
For Jinx if you can use ur traps to stop a dive then do so. If not hang onto them and when you get dived place the traps on top of the enemy as you run around your tower. Basically you need to recognize when your traps will stop a dive and when you need to wait to use them as a counter offense. You can also just run away and throw down the traps to prevent people from chasing you and run away from your tower closer to your base. This way you won't get surrounded and dived. You need to see them coming to do this but wards will help with that. Basically then you just spam help ping and hope your allies show up before the enemy takes your tower. This can work well if the enemy ends up sandwiched between your tower and your team.
There are also some situations when everyone and their mother is in your lane and you can't do anything about it except die, but there the problem is your team for not reacting to that and letting the enemy roam and pick off your team in outnumbered fights.
Anyways I hope this helps, you can ask if you have any questions.