I may be misreading it but I don't see what you have done wrong, NorthUp.
Yes you are supposed to fit in behind other traffic but equally traffic that ends up (for whatever reason) behind you is supposed to fit in behind you, and follow you all the way round. If they think you fly a big circuit, they are still supposed to fit in behind you, and follow you all the way round.
That procedure is clear. A lot of people don't like it and cut you up.
Equally, some people may not see you and turn base before you, but if you made the right calls in the right places.... these things can't be done perfectly.