It does look like the strings are a tad too far in.

My 2c worth is to get rid of the plastic rubbish and replace it with a nice bone nut.

If you grab one of our bone nuts you will find it will solve that problem.
The slots are also compensated to allow for the string thickness, this makes it a lot more comfortable to play.
Oh, and of course I must add one of DB's mantras...Bone for Tone!