I think the problem for me, in terms of theis that the encountered is designed so that you will most likely lose on your first attempt or two. Like, its attacks just fill up too much screen space and do too much damage, such that you're probably not going to avoid them the first few times you see them, and there is very little leeway because they'll kill you in a couple of hits. That's not fun; that's bullshit.Diggernaut (and Queen Metroid, to a lesser degree)
I love these kinda boss fights. First you see no land. But as you learn all the patterns, the fight itself becomes trivial. Feels like you've grown. That's why i love Monster Hunter so much as it operates like this.