WCS and warp disruption is not a chance based mechanic. If you have more stabilization than they have disruption, you can always warp away.
If you’re in a DST, and are hit with 2 points of disruption, you can still warp away. It takes 3 to stop you.
Be aware that different modules have different disruption strengths.
Warp Disruptors tend to have a single point of disruption. Faction Heavy disruptors can have 4.
Scrams tend to have 2 points. However, there are faction variants with more. an officer heavy scram can have 10, for example. Faction non heavy tend to have 3.
To complicate matters a little: Bubbles ignore this, so you just can’t warp if you’re in one. So a HIC or DIC will block you.
A WCS only provides a single point of protection. so if you add one to a DST, you have 3 points, so they need to hit you with 4 points of disruption.