Have a go with this:
Fabric Simulation.gh (420.8 KB)
It uses the extra goal I posted here
which does the collision also with the edges not just the points (and also adds a tiny offset to make sure no bits still poke through).
Also - it might work better if it is possible to combine the meshes it is colliding with into a single closed solid. At the moment it is many parts - it seems to work, but I think it could potentially cause issues if the fabric gets stuck between overlapping disjoint meshes.