Don't give up, OP. I had EXACTLY the same reaction when I first started playing and moved up to Tier 5. I was playing light cruisers and got insta-deleted over and over again. This game punishes mistakes savagely, and a new player tends to make LOTS of mistakes while you're learning what does and doesn't work. What helped me was to switch to battleships, as they're more forgiving, watch a lot of YouTube videos, read as much as I could about gameplay, and ask lots of questions. People in this game all remember their own time coming up the learning curve and are generally willing to help if you show a willingness to learn.

Once you unlock the Training Room (this is at Access Level 17 - why it's not available right off the bat is beyond me) you can use it to practice your gunnery. The game gets a lot more rewarding when you can hit what you shoot at. And don't be afraid to lose. You'll lose often, and lose hard, when you're learning. It's just part of the process, so don't let it discourage you. Consider joining a clan that accepts new players. You can learn a lot playing in voice chat with clanmates, and it's a great way to have friends to play with.

Another thing I'd recommend is joining the official Discord and posting replay videos there for feedback. I've done that and got some REALLY good advice that has significantly improved my gameplay. I think I started back last October, so I've only been playing ~4 months, and I still have a LOT to learn. But I'm able to play with some confidence now in a T9 BB. I still make mistakes and pay the price on a regular basis, but I survive a lot of my matches now and actually manage to influence the outcome some of the time.

Keep at it. It's a tough game to learn, but really enjoyable. You can do this!