Suddenly can't boot

I was using my 13 inch Macbook Pro (mid 2012) as normal when it suddenly became really slow and it became so unresponsive I just forced it to shutdown by holding down the power button. After that I couldn't boot it off of any partition as there was a question mark folder on boot. I launched the latest version of internet recovery mode by using option-command-r while restarting the computer. After that I used the Terminal and typed diskutil list /dev/disk0 and got:

/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *525.1 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                 Apple_APFS Container disk1         524.9 GB   disk0s2

followed by diskutil info /dev/disk0 with output:

Device Identifier:         disk0
   Device Node:               /dev/disk0
   Whole:                     Yes
   Part of Whole:             disk0
   Device / Media Name:       Crucial_CT525MX300SSD1

   Volume Name:               Not applicable (no file system)
   Mounted:                   Not applicable (no file system)
   File System:               None

   Content (IOContent):       GUID_partition_scheme
   OS Can Be Installed:       No
   Media Type:                Generic
   Protocol:                  SATA
   SMART Status:              Verified

   Disk Size:                 525.1 GB (525112713216 Bytes) (exactly 1025610768 512-Byte-Units)
   Device Block Size:         512 Bytes

   Read-Only Media:           No
   Read-Only Volume:          Not applicable (no file system)

   Device Location:           Internal
   Removable Media:           Fixed

   Solid State:               Yes
   Virtual:                   No
   Hardware AES Support:      No

followed by fsck_apfs -y /dev/disk0 and got:

** Checking the container superblock.
warning: checkpointsuperblock disagree for xp 203
warning: container has been mounted by APFS version 1412.141.3.7.2, which is newer than 1412.141.1
warning: disabling overallocation repairs by default; use -o to override
** Checking the EFI jumpstart record.
** Checking the space manager
error: (oid 0x30d62) cib: invalid o_cksum (0x0)
error: failed to read spaceman cib 0x30d62
   Space manager is invalid.
** The volume /dev/disk0 could not be verified completely.

after which I used fsck_apfs -y /dev/disk0s2 and got the exact same output. I notice the space manager is invalid, but is that the cause of my unbootable partition/drive? If yes, how do I solve it? If no, what could it be?