why does magneto feel so off

I can successfully play most of the tanks. I play Dr. strange, hulk, and thor mostly. Issue is when i play magneto I rarely feel successful, i feel so dependent on my teammates to finish targets. thing is i really want to get into magneto as i’ve become a big x-men fan recently and want a hard counter for punisher. any tips on how to play him differently from strange that will improve my performance?