Are the effects of disabled TRIM on an SSD fixable?

Question

macOS

Installed Yosemite, thought I had enabled TRIM, but 5 months later, I notice that the system began to slow down and TRIM was actually turned off.
Now I turned it on, but the brakes are still there.
Will they go away after a while, or do I need to do something to get the performance back?
SSD SanDisk Ultra Plus 256GB
I learned smart statistics, but I don't quite understand what all these numbers mean.

=== START OF INFORMATION SECTION ===
Model Family:     Marvell based SanDisk SSDs
Device Model:     SanDisk SDSSDHP256G
Serial Number:    140719401297
LU WWN Device Id: 5 001b44 bcf1ca745
Firmware Version: X2316RL
User Capacity:    256,060,514,304 bytes [256 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Form Factor:      Unknown (0x000a)
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS T13/1699-D revision 6
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Fri Jan 16 11:49:58 2015 YEKT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x00)	Offline data collection activity
          was never started.
          Auto Offline Data Collection: Disabled.
Self-test execution status:      (   0)	The previous self-test routine completed
          without error or no self-test has ever
          been run.
Total time to complete Offline
data collection: 		(    0) seconds.
Offline data collection
capabilities: 			 (0x11) SMART execute Offline immediate.
          No Auto Offline data collection support.
          Suspend Offline collection upon new
          command.
          No Offline surface scan supported.
          Self-test supported.
          No Conveyance Self-test supported.
          No Selective Self-test supported.
SMART capabilities:            (0x0003)	Saves SMART data before entering
          power-saving mode.
          Supports SMART auto save timer.
Error logging capability:        (0x01)	Error logging supported.
          General Purpose Logging supported.
Short self-test routine
recommended polling time: 	 (   2) minutes.
Extended self-test routine
recommended polling time: 	 (  10) minutes.

SMART Attributes Data Structure revision number: 4
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  5 Reallocated_Sector_Ct   0x0032   100   100   ---    Old_age   Always       -       0
  9 Power_On_Hours          0x0032   253   100   ---    Old_age   Always       -       3380
 12 Power_Cycle_Count       0x0032   100   100   ---    Old_age   Always       -       436
166 Min_W/E_Cycle           0x0032   100   100   ---    Old_age   Always       -       1
167 Min_Bad_Block/Die       0x0032   100   100   ---    Old_age   Always       -       26
168 Maximum_Erase_Cycle     0x0032   100   100   ---    Old_age   Always       -       135
169 Total_Bad_Block         0x0032   100   100   ---    Old_age   Always       -       447
171 Program_Fail_Count      0x0032   100   100   ---    Old_age   Always       -       0
172 Erase_Fail_Count        0x0032   100   100   ---    Old_age   Always       -       0
173 Avg_Write_Erase_Ct      0x0032   100   100   ---    Old_age   Always       -       36
174 Unexpect_Power_Loss_Ct  0x0032   100   100   ---    Old_age   Always       -       23
187 Reported_Uncorrect      0x0032   100   100   ---    Old_age   Always       -       0
194 Temperature_Celsius     0x0022   061   056   ---    Old_age   Always       -       39 (Min/Max 25/56)
212 SATA_PHY_Error          0x0032   100   100   ---    Old_age   Always       -       0
230 Perc_Write_Erase_Count  0x0032   100   100   ---    Old_age   Always       -       276
232 Perc_Avail_Resrvd_Space 0x0033   100   100   004    Pre-fail  Always       -       100
233 Total_NAND_Writes_GiB   0x0032   100   100   ---    Old_age   Always       -       9547
241 Total_Writes_GiB        0x0030   253   253   ---    Old_age   Offline      -       4024
242 Total_Reads_GiB         0x0030   253   253   ---    Old_age   Offline      -       3798
243 Unknown_Attribute       0x0032   100   100   ---    Old_age   Always       -       0

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
No self-tests have been logged.  [To run self-tests, use: smartctl -t]

Selective Self-tests/Logging not supported

Answer 1

The lack of trim does not affect the health of the SSD in any way.
The SSD itself does not care deeply about the trim, it is important only to the user of the SSD.
If there is a trim, the SSD clears the cells in advance, and the recording goes very quickly; if there is no trim, the cells are released at the time of recording, and the write speed drops many times.
If it is not possible to use trim, then you can leave 10-15% of the SSD unallocated.
In this case, the disk will always have a reserve of cleared cells in the amount of unallocated space.
This is how I use an SSD on XP and Server 2003
Performance after enabling trim should return pretty quickly, well, a day maximum, until the disk in the background cleans up all unused cells.
If this does not happen, the problem may be different, and not related to the trim.

Answer 2

I doubt that the disabled trim killed the ssd in a couple of months during normal use, perhaps the reason is something else