No file, I made a C# program that logs trim position and time from when “Trim Down” is pressed and held down.
Then I used Excel to process the data and created that graph.
According to users with more knowledge than me, this is an old bug/remnant from FSX which was brought over to MSFS.
I’m unaware of any way to fix/modify this. (One of the reasons I built my own trim-wheel, it’s a world of difference being able to control trim both mechanically and without this senseless acceleration)