Meh, Elder Gods are mostly chumps. Few people actually worship them so their powers have dwindled over the years. Few retain their powers without the worship of the massed.
On of the defining themes of the Cthulhu mythos is the insignificance of mankind on the cosmic scale. The Elder Gods don't require mankind to worship them, because humans are little more than insects to the Elder Gods.
Bogart is an excellent team lead. He has exceptional tactical skills and situational awareness from his years with HRT. Extremely cool under fire, he is also a crack shot, having won several marksmanship awards during his tenure at the FBI. His low-key demeanor and laconic sense of humor have made him a well-liked member of the RAINBOW team.
Yeah, if I remember rightly, the waning and waxing of the Great Old Ones' power is more to do with the cycles of the stars. Although human worshippers do tend to have a part in raising them from their slumber, or bringing them into our world.
John Brightling was the CEO of Horizon Corporation and the main antagonist of Tom Clancy's Rainbow Six. He planned to unleash a virus on the world that would cause the extinction of the human race and sparing only the chosen few follow him to help him rebuild to planet into a polution free zone