The Dillinger Escape Plan. Difficult music. My first encounter: support for Slipknot in Warsaw, 2005. It was too hardcore, extreme, too much noise, aggression, chaos, I didn't like the high pitched screaming and frequent changes of the tempo. Since then, every once in a while, I give them a chance and try if I would change my mind. Still there are many hard to listen parts, but I learned to appreciate their craft more. I guess it's called radicalisation.
Don't let today's example trick you. This is actually very pleasant:
https://tidal.com/track/575833300/u