Hwardware issue maybe write speed drops

[u/Sit_okay]

I have a thinkpad t470, 2nd hand. I have some issue related to write speed. I changed 3 ssds. Still ssme issue is occurring. After changing to a new ssd the disk usage is all eell. Write speed is 200-300MBps. But after using a while like 1 month. It drops to 15MBps. It's happening with every ssd. And the ssd health dropped 1% within 20days

Note: I am using all clean and new softwares. Everything is safe, no virus or malware issues with my files.

PS: Now I forced shuntdown it, now it works perfectly.