Operating system: Darwin-17.7.0-x86_64-i386-64bit 64 Bits
Graphics card: NVIDIA GeForce GTX 980 Ti OpenGL Engine NVIDIA Corporation 4.1 NVIDIA-10.33.0 318.104.22.168.40.105
Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: rB375c7dc4caf4
Also broken in previous version and also 2.90 alpha
Worked: Never (2.79+)
Short description of error
In the Graph Editor the bézier handles are meant to be pulled to shape the f-curve.
Currently it seems these handles have a threshold/limitation that prevent strong manipulation.
This is a real shortcoming for animation work.
Exact steps for others to reproduce the error
Open attached .blend file.
Playback and observe the motion difference (here the desired motion is accomplished by adding more keyframes).
Scaling the handles can never accomplish the desired curve.
It should be possible like this :