use it for downloading and streaming. switch to airtel when gaming is all i can suggest. it might or might not stabilize on its own with time. hope for the arrival of excitel fiber in your area soon which might fix the packet loss problem. keep an eye on it for the next couple of days to see if this is a permanent issue or just temporary.
Excitel/Local LCO gave me a CAT5e cable with 8 wires (4 pair) in them.
As far as why is it failing it requires you to dig deeper in the load balancer. In my case in the edgerouter the load balancer checks for ping.ubnt.com and if its not reachable it will switch to the other network.
The problem can be that the server which the load balancer is used to check whether the connection is up or not may not be reachable through excitel (highly likely because sometimes their DNS doesn't work because of which some sites are not reachable).
You can try and manually pinging the server if you can get the name of the server which the load balancer is using.