Why bendy bone segmenting does not work? The first picture is when I haven't yet segmented the bones:

The second one is when I have segmented (segmented to 16) both two bones:

As you can see, the bending is still sharp. Please help.
Your bones don't seem to be displayed as B bones but as sticks. You need to go in the Properties panel &gt; Object Data &gt; Viewport Display &gt; Display As and choose B Bone.