PS3 controller not connecting

[bbruh5918-arch]

I followed the guide from https://youtu.be/SImZqU5pu4U
And everything was fine until I held and pressed the ps button and then it connected then instantly disconnected I don't know why I did everything perfectly I used another controller and sane thing I use the OEM cable that came with it
Currently I only have a picture of the red controller Dualschock3 sixaxis