Blinky is right. The core is bunched up and that splice will never get much deeper than what you have now. Also, and I think this the is part Blinky is talking about- the cover is bunching up, too....or at least it looks like it in the pic.
When I run splices home, I put a fid in the eye, and pull on the fid with one hand, while milking with the other. This keeps tension on the eye while you run the splice home.
Regarding the pull fid, they make a whole world of difference, I think. I rarely find myself using push fids...though it happens sometimes (Beeline and HRC get push fids, for example). The wand excels by GRABBING on to the end of the rope. It allows you to hold on to tinier tails, making it easier to pull the tails through. However, the wand does have $ome limitation$.
When running the splice home, as soon as it gets difficult, stop. Massage the heck out of the rope by bending it at the throat tightly in all directions. When I do it, I make the rope do a full 180 at the throat and I put tension on the little loop I just formed. It gives you more room to work with when you proceed with the burying.
Thank you or the clear picture. It makes it a lot easy for us all to learn with you!
love
nick