How can I troubleshoot a slow and unstable Wi-Fi connection caused by a possible hardware damage or misconfiguration?

 
I have a six-year-old laptop from a Polish brand called "Dream Machines" with an Intel Wireless AC 9560 160MHZ adapter. The adapter settings have not been changed. The laptop fell off the table recently, but it seemed to work fine afterwards. However, when I opened the lid to check for any damage and clean it, I accidentally dropped a screw under the adapter. I had to remove the two wires and the adapter from their slots to get the screw back. I reattached everything as it was before, but since then the Wi-Fi connection has been very poor. The symptoms are:

 

The adapter can only detect 1-2 networks out of 20 that were previously visible.


The internet speed has dropped from about 80mb/s to 0.6mb/s.


The internet speed seems to improve slightly over time, but not significantly.


Sometimes the router rejects the correct password and I have to enter it again to connect.

 
I have tried the following solutions, but none of them worked:


Restarting the system multiple times.


Disabling and enabling the driver and checking for updates.


Performing a network reset from Windows 11 settings and using ipconfig/netsh commands.


Ensuring a better connection for the adapter cables.


Reslotting the adapter and swapping the positions of the wires and the caps.


Holding down the power button for 3 minutes without the battery or the power cable.

 
I
 suspect that the problem is either a connectivity issue due to the loose wires and caps, or a hardware damage due to the fall. However, I am not sure why the adapter still works at all, albeit poorly. I have attached an image (via Imgur link) that shows how the adapter looks like in my laptop. How can I fix this issue?
 
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