The Wierd Bluetooth Glitch.

Hello Fellow Repairers.

My google pixel 4xl has beein acting very wierd lately as it exhibits so many problems including the popular wierd greenish screen, i think its because of its old age but the one thing that stands out its the phones' Bluetooth conectivity and transmission'

IT'S so hard to explain but let me try;

The bluetooth is hard to connect and when it finally does connect to a device , it starts acting glitchy and transmission is kind of slow and when its connected to a device , i cannot move the phone around because when i do that( lemme take connecting to a headphone for example) , its just start glitching like its loosing connectivity and music playback is just....... Wierd.

The problem is just unpredictable because sometimes even if the connected device is ON THE PHONE or reverse, '''' it still glitches. The glitchy transmission is like a BROKEN CABLE barely holding that can disconnect if someone shakes or wiggles it.

I took it to a repair shop and they said they don't have the resources to fix such a problem. I too have tried everything like hard reseting, booting the phone on safe mode to reset network and wireless coneectivity options like so many time to no avail. Wanted to wipe cache and data but those options were greyed out. I would really like to hear some ideas, tips or solutions on this.