If you’re a comic fan, the only comics one should even want to try avoiding are newer comics (1-2 years old), and that’s only if they’re wanting to have any amount of surprise. For most comics, especially ones that are 35 years old like the one you got “spoiled” on, that information is usually knowledge that the DC fandom community knows at large. A lot of DC lore is known by people even before they read a book. You know that Jason Todd was Robin but then became Red Hood, right? Anyone remotely interested in Batman could learn that type of thing before they even pick up a comic. But how did it happen? That’s the important question. And even if you learn some details about the “how”s, you still can’t learn everything unless you read it yourself.
There’s no “dealing with it” if you don’t let it upset you in the first place. Sounds like you need to accept that as a comic fan you’re supposed to largely know what happens in books before you read them, if you’re immersed in the lore and fandom at all.
