Numerous problems encountered with gazebo, ros and wslg

[cybershiptrooper]

1. Gazebo performance very poor even with Mesa 21.1.5
   I am using a surface book 2(8 cores, i7-8650U, 16GB ram, GeForce GTX 1060) and I am getting a real-time factor of 0.1-0.3 even after GPU virtualisation. The GPU virtualisation seems to be working, however. I tried increasing ram using wslconfig, but gazebo GUI stopped showing up after that! Also, on running free -m, I see around 6GB of unused ram. (So, a CPU problem?)

2. Rviz GUI not working at all
   After starting rviz, the GUI windows themselves started getting laggy. On running task manager, I see that the CPU usage is at around 100%. Running similar simulations in dual boot used to work for me, but it seems to be a major issue in wslg. Is there any way to make it work? I'm at the end of my patience now..

3. Rviz not rendering bot
   This may not be a problem related to wslg or the previous two problems, but I could not find any reason for this anomaly: after getting mesa 21, the main robot in rviz was not getting rendered. Everything else was. I got no error message, and it said all urdfs are parsed properly. I changed LANG according to this, but it still didn't work. If someone was able to set up mesa, ros and gazebo, please do help :"(