I gotta ask: why the hate towards Hawkeye? Granted, he doesn't got major powers like the rest but he deserves to be a hero like everyone else.
That is the reason. People like Black Widow and Hawkeye are incredibly skilled of course, compared to normal people. But you put them up against someone naturally powerful like Thor, Captain Marvel, or Scarlet Witch--or someone with powerful technology like Iron Man or War Machine--and they're nothing.