S550 Liftoff Failure - please help!

I have been working on a s550 build on and off for quite sometime now and I am stuck at the same issue I was stuck at before. The hexacopter will not lift off when throttle is increased to 100%. I am using a 5000 mah battery and apm 2.6 flight controller. Here is a link to a video of the failed takeoff. Any suggestions would be greatly appreciated. Thank you.
https://drive.google.com/file/d/16FcQ1LlAfL7DBi3FgpMn_LUrjP-05NEV/view?usp=sharing

Are those props all spinning the correct direction?

All of the props are turning backwards…

Yep, backwards.

Can you feel the air pushing up? :slight_smile: