I sprained my left middle finger yesterday

Fell off my bike when it flipped over after it went between the area of the edge of the sidewalk and grass. The sidewalk was slightly elevated by a few inches off the ground, and my bike's brakes don't work properly plus I was going downhill. My wrist pads protected my palm and wrist, but sadly as my fingers were exposed they weren't. I think I should seriously throw out my bike and get a new one, considering how it's rusted up, the gear wheel randomly shakes, wheels are wobbly, and the steering is misaligned. I've owned the bike for a decade and used it for almost as long (excluding winters ofc), and as it's an entry level model I should've replaced it years ago.