Fishing minigame is horrible.

[Neosuduno]

Seriously, the casting I understand, but the second part requires way too much focus to be fun. Try toning the decay rate down A LOT.

[Captain WaddleDee]

The trick to it is to level the Angler quite a bit talent wise. At level 2 Talent, you don't have to button mash as hard and at level 3, the secondary bar stays full longer.

Hint : First bar you see is to get the bar closest to the target without going over. The next section has two bars which I will explain here. Top bar for the second stage is a button mash which changes every 4-8 seconds. It is always a primary control button. The second bar is a held direction which changes rather chaotically every 2-5 seconds. If it says up, you hold up to regenerate the durability of the line.