Hi Ditto, also another way to describe it if it helps -

This sharp point here that you don't like:



That point is a constant distance away from the original curve - the way that distance is measured is from that point to the closest location on the curve which will be along perpendicular lines to the curve like this:



Now imagine if there was some rounding happening at that corner instead of it being sharp - the rounded area would be further away from the curve than your offset distance, and so would not be a true constant-distance offset result any longer:




Offset is focused on generating a constant distance result, so that's why it will produce those sharp corners in situations like this - otherwise if it rounded those off automatically it would not be producing an actual offset curve.

But you can round those corners off by some other operations after the offset if that's the result you want - one convenient way is to use the Fillet command which can fillet corners of a curve like that and put in an arc piece in there.

- Michael