Yeah, he's made up his mind, that this is gamebreaking and makes the game unplayable..
I don't think anet intended a game feature that was so hyped and wanted to be done and completed (achievement-wise) in two weeks after expansion launch. Yes, it sucks that you have such bad luck with mackerels, but I don't really think you should care this much about an achievement, which was obviously something you were meant to work on over a longer period of time (just like the weapon killing and slayer achievements). You're making this into a grind by rushing it. Just enjoy fishing and vary your fishing locations, then suddenly you're done 🙂
Just don't let this frustration affect your real life, cause the way you discuss this so passionately kinda indicates it does in a negative way 😞
Good luck on your fishing achievements though! 🙂