I agree with you that the Ramp Test might overestimate my real FTP.
It’s just that I did all those tests in the same conditions: TrainerRoad app, same bike, same trainer, same everything except temperature (I didn’t record it). So, if it overestimated in January, it’s still overestimating it this week. I am more concerned with the downward trend than the actual absolute number.
I did adjust the setting to 265 a few days after the test because the workouts were too hard (except for Sweet Spot and Threshold).
It’s possible that I went through a vicious circle:
Ramp Test FTP too high at first
Fitness deteriorates during training cycle
Ramp Test FTP lower (but still too high compared to actual FTP)
Then repeat 2/3… burying myself.
It seems like the mid-volume plans offer more variety as well.
As suggested by @kitenski: