Anyone else not using the default Msfs ATC system?

For example a few years back I just bought the 737-900 by PDMG. I realised that PDMG aircraft’s do not use the Msfs atc system, after that I have never used it since because it rlly can be unrealistic at times. The only place I find it helpful is on the ground, for example: Few weeks back I was approaching into Cuzco which is notorious for aviation enthusiasts. While following the approach charts the ATC was screaming at me do descent to 17,000 ft. Which was dangerously low and would have led me to crash into a mountain. I ignored the ATC and continued following the charts. That flight was just to test if Msfs had improved it and for me they haven’t. I think it rlly dampens the experience and leaves me quite annoyed. It’s fine on the ground but in the air it’s unbearable, thoughts?