MacBookPro11,5 comes to a Screeching Halt Sporadically - Faults in Console

[KingCornWallis]

My MacBook has worked like a charm until recently when I had swapped out my drive so that I could format and test another Apple Blade SSD. Afterwards I put my SSD back in and reset the PRAM (System was shut down before removing components...really don't think I damaged anything). Every once in a while the system will struggle to do basically anything for a few minutes (even loading Webpages, and typing), especially Apple apps (chrome seems to work a little better in these slowdowns). Nothing ever crashes though...

I have been running a 2TB SX8200 Pro with a Sintech Adapter (ordered directly from Sintech) for about 2 years without issue. Trim has been enabled, and there is about 250GB of space free. On the latest macOS Monterey.

Previously battery life had become a serious issue...as even with a brand new Apple Battery inside I was only getting about 90 minutes. After some reading I had disabled OneDrive from startup as well as turned off Spotlight Indexing.

I mention this because somehow Spotlight Indexing was re-enabled at some point after (or at the time) I re-installed my SSD. While Spotlight never really slowed down my computer in the past, it is now a variable.

Have done the following:

1. PRAM Rest
2. SMC Reset
3. Removed SSD again and clean pins/socket
4. In-Place macOS Reinstall via Internet Recovery
5. System Repairs via Onyx

As far as monitoring the issues:

1. Not really seeing anything of interest inside of Activity Monitor
2. Haven't dug too deep in Console, but not much in the way of crashes there (console actually crashed while running though XD)
3. Istat Menus are installed, and I never see that much activity (it's a max config MBP11,5)

I am going to turn off all 3rd party apps from running in the background, and if that doesn't help I will kill spotlight again and see what happens.

EDIT: Console is spitting out a metric butt-ton of repeated Errors and Faults...add a txt doc of the faults

SECOND EDIT: Turns out the Sintech adapter went bad (or was damaged?); replacing it fixed everything.