Is it possible to replace a broken Motherboard connector

Hello,

I own a Nexus 5 for 4 years now and recently had to move on to a new phone.

The whole problem started (i believe) after i replaced the battery (which did improve the battery life and i was super happy about it in the first place) but...

While replacing the battery i screwed-up and accidently damaged the connector/slot (not sure how its called) on the motherboard (see image - not mine but just to show you want i'm writing about).

After the battery replacement the phone worked fine for about half a year and then the screen problems started:

The screen was not fully/equally highlighted; sometimes the left bottom corner/sometimes right bottom corner.

When i pushed the back of the phone with my finger (where the connectors is) it turned back to normal.

THe issue was getting worst over time and once it got me to the point where i was too frustrated i've opened it up unplugged the connector and plugged in again - this worked fine for the next 2 weeks and then the problem came back.

Now the screen wont show up anything (black) and when i open the phone and push on the connectors it will sometimes turn on for a sec but thats not enough even to set the file transfer so that i could take my files from it.

My question is:

Is it somehow possible to just replace this very small part or do i need a complete new motherboard?

Is it possible that the motherboard is not the problem but the so called "Oompa-Loompa-colored daughterboard" mentioned here