No shame in that. You could start accustoming your ears by searching YT for "bass and drums isolated" and listen to those versions and then the originals and see if you separate the bass better.

Hmm, is there supposed to be much of a difference? I recon, if it was physically possible to make a trumpet sound like a tuba, that would be very popular. And as I understand, that is possible with e-guitar and e-bass, because electronics...

listen to Ride the Lightning then Justice for All.

Just, you know, don't throw me under the bus for it.

There are a few websites that can separate stems. I use lalal.ai to get the bass line and then convert it to tabs using another service.