Dude, it's not even primarily that trying to find the right spot to jump in at is hard, it's the sheer fucking amount of pointless, garbage backstory hanging off these stories that have been running for 50 years.
You wanna fucking know what, I dunno let's say Hank McCoy, is about.
First of all you're not going to fucking read everything he's been in since the fucking 60's.
But you don't want to miss anything important so you're going to read the fucking wiki page.
As it turns out, over the course of 50 years Beast has faced everything from the Civil Rights movement, to X-men persecution, Skrulls, Magneto having cancer, feline AIDS, 19 different women he's fucked, all that stupid fucking garbage.
What's the fucking point of reading his shit? You're 45 years too late to actually see an honest-to-god literary story arc.
All that you're seeing now is essentially an author picking up an action figure, smashing it together with another while making pew pew noises and saying "Oh man wouldn't it be cool if Beast learned how to use magic?"
You can't be fucking get into this shit anymore.
These are fucking solved characters.
Good luck getting fresh blood to start at the 54th season of a soap opera.