well, i know this will sound odd, but a boss that i honestly hate is the Wither, the minecraft bedrock edition. For those who dosent know, Minecraft has Two Versions, Java and Bedrock, and the wither acts COMPLETELY DIFERENT depending on the Version. In Java? you can just summon him in a cave and you wont have many trouble, since he wont break blocks or move that fast when his HP bar is at 50%. also, he dosent summon any Wither Skeletons, making the fight a joke since i remember times where i literally had full iron gear and shields and beat it at the first try.

However in bedrock there is a completely diferent story...Because that abomination becomes extremely hard and tedious for no reason. first, the old trick of trapping him in a hole in a cave wont save you, since he can destroy blocks around him AT THE START OF THE FIGHT, making it more tedious to kill. another thing to mention is his mobility, he can fly ludicrously fast for no reason and launch wither skulls that inflicts wither for almost 10 seconds i think. Wha Happens when his HP bar is at 50%, he will move WAY FASTER, summon 3-4 Wither skeletons and he puts a force field that deals damage to you when to close, making you think when to get close to him and not die by al his attacks.

For the bedrock vesrion, You are obligated to have a diamond armour and gear with some potions and enchanted apples, otherwise, the fights is extremely tedious and stresfull for everything that thing summons. and i can tell by experience to beat both version, Including The mobile port for minecraft (Wich is bedrock).

Yeah, my boss.

tbh. goro majima from yakuza kiwami, chapter 5 or 6 I don't really remember but it was fight in baseball center. and i don't really understand why i had so many troubles with him, even jingu didn't gave me that much pain

the final boss from psychonauts. not because its hard, but the exact opposite, where it's such a pushover it leads to a complete anticlimax.

also the spider boss from blood, because it continuously spawns smaller spiders without stopping, and those spiders add a really annoying effect to the screen if you get hurt by them that lasts for like 10 seconds

Isma: Hollow Knight: Pale Court

Jesus fucking Chris fuck this garbage boss up her ass! The main reason why is because of the two kinds of plants she spawns; Fool Eaters, which lay on the ground and chomp on you if you're above them, and Gulka, which shoot projectiles at you. Keep in mind she spawns MULTIPLE of these things in one move, which already makes the fight a pain in the ass.

This is all made worse later in the fight where she makes vine walls that you have to damage to get rid of, and they can spawn n the worst distance at the worst time, keep in mind at this point in the fight the arena gets smaller. Too top all of this, her vine attacks have long range.

Now brings all the problems of the fights together and you'd see what I mean when this boss sucks.

Can't wait to see how bullshit the other bosses are in this mod.