TRS inputs sound really bad and low signal

I plugged my computer speaker out to a TRS input on channel 15 and 16 to keep it separate. The audio coming in is terrible and low signal. Super high distortion and can barely hear it over the monitors. I really hope this is a setting issue and not a defective unit problem. All of my XLR inputs sound great. It's acting like what would happen if I didn't have phantom power enabled for my condenser mic. Anyone know how to fix this issue? I'm assuming its a setting problem rather than a defective board cause theres no sign of physical damage and the xlr mic inputs work great.

I don't have any input assigned to a bus cause i still cant figure out how to do this. Could this be the issue? It's just sent to the MASTER RED L/R fader.