Hi
@Hoodiegirl3 and welcome to the forums. I've been living with T1 since I was 8 (in the caveman years when we had insulin but no glucometers, let alone cgms or pumps). In some ways that made my childhood easier (no blood testing) but I can truthfully say that my control in my teenage years was abysmal. Not sure how high my levels went, but occasionally felt very ill with ketones and often was extremely thirsty. When I finally got a glucometer in my early twenties my clinic suggested I might like to start by getting my hba1c below 10 (that is an average bg of 13 so I hate to think what I was running at before).
But as I remember it, just being a teenager is hard for anyone. Having diabetes definitely makes it harder. The most miserable time in my life was when I was about your age and was getting bullied at school. I remember thinking that life was terrible and it would never get better. But the thing was, things did improve eventually. Now, whenever things are a bit grim I look back at that time and remember how low I felt then and that that didn't last forever (though it felt like it at the time).
I'm on a t-slim too and though I love it compared to my previous use of short and long acting insulin, it is relatively high maintenance in terms of user adjustments. (You need to keep your basal rates right and I suspect that as a teenager your rates may change quite rapidly.) So a different pump with an algorithm that does more of the work might be better for you?
Anyway, I'm hopeful that your diabetes will be a lot easier to control when you are older and your hormones have settled down (not much help now I appreciate).
Do you have a good relationship with your diabetic clinic? They will have seen a lot of young people in your position and hopefully will be supportive, though I appreciate some clinics are better than others. It's worth asking them for help if you feel you can.
Sending you best wishes and virtual hugs from New Zealand.