I definitely agree with this statement. I had the same experience.
The audio decoys helped a lot but they honestly didn’t know where I was. And when I struck, I hit hard.
Although I was tired of killing most of the team and the them calling everyone back in mere seconds. Furthermore, not being able to use bear traps was annoying.
I got that feeling that the FT was actually afraid. And clueless, as they should be. They strived to finish the mission much faster.