Manjaro crashed and it can't load the OS properly anymore

[freggel.doe]

@Antarmanu71

I pressed the hardware reset button and kept it pressed for about 10 seconds, which is when the laptop shuts down normally

Just to be clear: that is no normal shutdown but a forced one. Pressing (and releasing!) the power button should trigger a normal shutdown.
Also see

[HowTo] reboot / turn off your frozen computer: REISUB/REISUO

Difficulty: ★★☆☆☆ This tutorial was created because people are using a hard power off during freezes, so this will teach you how to turn off your computer when everything is frozen using softer means. So whenever you see someone saying they had to “Power Off” or “Hard Reset” their system without doing a REISUB, please send them here! If you’re reading this in response to a question, please click the green link above this text to bring you to the full unabridged text of the tutorial…

@Antarmanu71

failing ata1, hardware error

That sounds like a hardware problem - do check SMART info of that drive and backup important data as soon as possible.