I have not read Avengers 200, after I read this review of Avengers 503 I searched who Marcus was and it said pretty much the same thing as this review, but that he was in Avengers 200 and it also said that it was like when Magneto a few months after Xorneto wrecked NY appeared infront of every Avenger the past few decades and asks for his daughter and is given her.Captain America, passively, willingly, unbelievably, hands the Scarlet Witch over to the psychotic mutant terrorist Magneto. I was surprised they didn't wish them well like they did when Ms. Marvel's rapist, Marcus, spirited her away to Limbo for a second time. Again, the Avengers stand there and let the villains escape.
That said I noticed the times the "villians" get their way with the Avengers is usually when they are upfront and tell the Avengers point blank what they want and as long as it isn't something along the lines of killing thousands or taking over the world the Avengers usually say ok. I am not sure if this would be called guile or just being direct.
If you notice the enemies of the Avengers that get what they want are not the ones that fight them directly in pitched battles.