It also doesn't mean he didn't act incompetently or that he saw his way and methodology as one big giant screw up. The X-men have screwed up a ton that doesn't mean they should not fight for the dream or that there haven't been successes. Magneto's successes are failures.
From one perspective, his successes are failures. But "it doesn't mean he didn't act incompetently" is not a defense. You said that Magneto was leaning on Storm due to his incompetency as a villain, and I have yet to see you actually prove that assertion. So, having said all that, let's just move on.