My MacBook Pro shuts down a few times a day without obvious reason. This is a new problem and was not occurring before Big Sur and seems to have gotten worse recently - which coincides with the latest Big Sur update.
Just now it shut down for the second time in about a half hour with 66% battery power showing BUT it also shut down earlier today while running on AC and fully charged.
You have a great mac - I have used one exactly like it, and though I now have a 2019 16" MBP, the 2014 is still going strong, used by the wife.
Two things stand out immediately from the report:
Your battery is failing
You have fallen for the **** that is "cleanmymac".
NEVER installed anything like "cleaners", "optimizers" or "antivirus".
They offer zero benefit, degrade perfornance and cause all sorts of issues. And among them this one is notorious for corrupting systems left and right.
Start by uninstalling this - you have to follow their instructions for that.
You also have an inordinate amount of launch agents and daemons.
Most likely several of those were installed years ago.
You should take the opportunity and do a full backup.
Then do an erase and install, and migrate ONLY the user accounts.
Your mac will thank you and reward you for it.
Please run Etrecheck and post its full report here. Use the "additional text" button and paste the report into the text box.
In addition, you also have stuff like Cocktail and TechTool Pro - you need none of that.
Shut down on big Sur
