First layer inconsistent -ENDER3

hey first-time poster
but been in the 3d printing world for a couple of years now
but now I’ve got a problem with my ender 3
it’s doing pattern in the first layer making it weak and vulnerable to peeling
what I wanna know is it my cura settings or a hardware problem
feels like I’ve tried everything

Hi, first i would check the extruder gear if it is damaged or filament sticks on it.
The second thing i would try is an other spool of filament.

The failure looks extremely regular
The filament gets thicker and thiner on the build plate.