I'm kinda stuck and don't know if I've hit my bottleneck

Before i say anything else: i absolutely adore this game and think its genuinely one of the best ive ever played. I love the story, gameplay, the world, the characters, and tbh everything about it. No i dont think the game is too hard i am a true believer in the Git Gud

However, Ive recently reached Act 3 and im at my wits end, every enemy i run into is obliterating me into bits and i cant make any meaningful progress. It also feels like the game has now shifted into being mostly "battle" based whereas the first 2 acts were like a mix of exploration, puzzles, side quests and the occasional boss battle. But now in act 3 every single thing to do is a boss battle that all seem just frustrating, i cant figure out a build for it and the black threaded attacks just mess me up before i get the chance to get any hits in.

I am aware that this is mostly a me issue and i just need to learn the patterns and sink even more time into it to progress farther, my question is rather:

Does it stay that way until the end? Or is there a light at the end of the tunnel where i can at least like enjoy the story in game, or get to explore, solve puzzles and do side quests again? Is act 3 really just boss after boss until you hit the end boss again?

Please help im really frustrated with this because i really want to enjoy this game to the end