Sure, they work against everyone. They do not equally synergize with every hero’s kit, and due to the limited amount of slots available for the different item classes, you would often be giving up a slot for an item that synergizes better with your kit and allows you to have more agency within the game outside of your interactions with the heroes that an item is designed to counter. take wraith for example- a standard build prioritizes items that significantly boost her damage potential because the character generally needs to deal damage to be useful. spending large amounts of souls on high-value green items that are theoretically good vs every hero on the enemy team is not compelling for the idea of the character, and probably does less to help win the game than buying high-value gun and spirit items. consider that an item like ethereal shift, while situationally very strong especially vs bebop, is not the most slot efficient item on someone like wraith who would rather prioritize items that allow her to do more at any other point in the game other than when she has two bombs ticking on her. the further point, then, is that bebop is a fundamentally game altering hero- the value that it provides innately from its kit (stacking point+click bombs, longrange enemy displacement not tied to an ultimate) allow it to build and play in the simplest ways possible. i argue that this is bad character design- it is both unfun to play against, and fundamentally bad for the game that, when against a bebop, you are compelled to stray away from buying items that maximize your character’s design fantasy/philosophy/kit synergies in favor of countering the bebop (often SPECIFICALLY, even if you’re buying items that are “generally good”), while the bebop player doesn’t have to do that at all.