Hi dune1982, well the wireframe there is ambiguous, there are 2 ways you could have a bent shape from that, either like this:



Or like this:



In either case, I'd recommend leaving the corners at the ends to be sharp initially, then build the base shape with Extrude, then thicken the extruded joined surface object into a solid using Construct > Offset > Shell (or you can Offset the curve and have the thickened shape right from the initial Extrude), then doing the rounded corners at the ends by selecting the end edges and using Construct > Fillet:





Right now you've made things more difficult by trying to incorporate all the final rounded edges in your wireframe from the start, it's easier to generate some of those rounded edges by using filleting rather than having them in your initial curves. Often times with NURBS modeling it's good for some portions of your final model to be built by cutting away material by booleans or in this case fillets, rather than trying to draw every single curve in the final model right from the start. The curves you want to draw are the ones that will make an initial simplified extended piece of base material.

Hope that makes sense!

- Michael