boss

for real can we get a icon for bosses some boss you can't even see sometime.

it's called a "challenge in a difficult game".
if everything is obvious, signposted, and the software is holding your hand it's simply not attractive to many.

This game has zero visual clarity combined with laughably bad performance for absurd hardware requirements.

The more you play POE, the more you learn that you must kill everything without being able to see it and before it appears on your screen, assuming you can even see it on your screen amongst the pixelated mud.

Point your abilities in the general direction and slam that keyboard. Either you will succeed or the "YOU HAVE DIED" message will appear, with no explanation of course.

Good luck

This is a problem brought about by your playstyle. If you want to play a glass cannon off screen build you can. You can absolutely enjoy melee style combat, even if it is slightly inferior.