Hey there vivian928w,
Welcome to the Apple Support Communities!
We see you're having an issue with your camera quality after updating your iPhone.
Our article here can help you with resolving many issues with your camera including blurry photos:
If the camera or flash on your iPhone, iPad, or iPod touch isn't working
If you're noticing the issue when sending photos through messages, we'd like to have you check if you have Low Quality Image Mode enabled in Settings > Messages. If so, disable this setting, and let us know if you see a difference.
If your issue isn't when sending messages, when do you notice the poor quality of your photos?
We look forward to hearing back!
Take care!