Cyclops blaming himself for everything is no surprise, he did after dark Phoenix, after Maddie, after Nathan went to the future, after Jean died, after avx so it's pretty consistent with his character whether we like it or not ¬¬
Now there's a certain pretentiousness to that that I'm sure cyclops doesn't even realize, by putting himself as the sole responsible for what happens he also puts himself as the one that's meant to be a Savior, messiah and martyr thus reducing the importance of the rest of the X-Men to mere cheerleaders and supporters for his next fall and sacrifice and when the war is over he's both a Savior and a destroyer while everyone else is sidelined thus placing the core narrative on him. Every mutant has a choice on what happens, can take decisions and those influence what happens to their race in the future, If theoretically everyone shouldered the responsibility of what happens instead of willingly allow cyclops to become a martyr then everyone would have a chance to shine. Cyclops blaming himself allows him to shoulder the good and the bad thus giving room for growth and complex stories, while having other characters not wanting to be bad makes their stories bland, cookie cutter with no stakes and lame