I'll try to help. But you'll have to elaborate on what exactly is your issue. Saying internet issue won't help. Elaborate. Whether linked to Wi-Fi or mobile data? And what exactly is the issue.
Touch problem? You screen doesn't respond to your touch ?
Camera going bad day by day 🤔. For that, OnePlus will have to send updates every day (so that it can degrade it every day).
For battery, charging issues, refer this:
https://forums.oneplus.com/threads/...heating-and-charging-feedback-thread.1422453/Click to expand...