Sure! Here's a short and clear version:

You're seeing sliding and jittering because SAT gives you the smallest push direction, which isn’t always up. That makes the player slowly slide off slopes or flicker between grounded and not grounded.

✅ Quick Fixes:

1. Use surface normals
   Check the angle of the surface you're on — if it's mostly flat (e.g., normal.y > 0.7), you're grounded.

2. Stop gravity when grounded
   If grounded, skip applying gravity. Only re-enable gravity when you’re clearly off the ground.

3. Stick to ground
   After collision, do a small downward raycast. If ground is right below, snap to it gently.

4. Use a grounded timer
   Don’t toggle grounded every frame. Add a short delay (like 0.2s) before saying you're in the air.

This approach gives smoother movement and prevents sliding off small slopes.