Well..don't give up!
I caught my first salmon there in 2014 and I only half knew what I was doing lol...Then followed a 3 year drought when I wasn't even hooking up anything there..then this year it changed and so far of the 4 trips there this season, on 2 trips I was hooking at least a fish or two..my landing ratio is still something I have to work on though 
Admittedly if I had fished there more often I would have figured it out much sooner
Word.
I started fishing the Cap river mouth in 1993. I had recently settled in BC and was new to salmon fishing and fishing in tidal waters. This was before the days of the internet; I didn't know anybody who fished there, and all I had to go one was Eric Carlisle's book, weekly fishing reports in the Vancouver Sun, and learning by doing and observing.
In 1993 I went out 8 times between late July and late Sept. Didn't hook any coho but saw many being landed.
My fortunes changed in 1994, I went out on July 9, hooked 2, landed 1. And on Aug 5 I hooked one and lost it at my feet.
In 1995, I got skunked twice in July, and in 1996 I got skunked twice more.
July 20, 1996 was my last time beach fishing the Capilano estuary. My life changed with birth of our first son, and I started to fish other locations during the summer months.
So, as others have said, it does time to figure it out!