I think what you have Richard is the complete set as far as I can remember, from when I built the review kit for Radio Control Boat modeller/
The "other bits" that you see on other people's models are most probably extra detailing that really only comes from experience in prolongued study and building of such models, or in my case spending time scrambling over such trawlers as a young man working as a "ships supplier" in my holiday time.
Unfortunately, these "bits" only come from some years of experience, but I have to defend the kit in that (as a somewhat semi experienced modeller at the time I built it many years ago) I DID find the instructions and even the none scale plans adequate to build her to a satisfactory standard, with little problem, but I had a lot of knowledge of that type of ship.
However, it does seem that you are really not enoying the model or building her.
Why not have a break from it, build something else, and then once the enthusiasm is fired up again, go back to it.
It took me nearly 6 years to build the model of a modified St Nectan, the large mountfleet Models trawler, because it was such a mamoth task, and the instructions were very sparce. But I kept leaving it when ever I got bored, and going back to it later. It was the only way I completed the task, as I came very close to binning it on a few occasions.
Give it a break, and try something else.
That's my advice in your situation, and do a little research on that type of vessel for the other "bits".
neil.