Blackholes don’t suck. They have a gravitational force like any other planet and star, but because of how small a blackhole is, the force of gravity, is proportionally greater than an object of equal mass. So, gravity is greater the closer you get to an object. That means that the ground right under your feat have a stronger gravitational force on you then the land on the opposite side of the earth. This is true for all objects, but because of how weak of a force Gravity is, it makes no major difference on how the gravitational force of an object feels. It’s only when you get to distances like that of reaching Space. A blackhole though, is so minuscule, that if you equal distance from a black hole with the same mass as the earth as you are to the center of mass of the earth, you would find the gravitational force to be greater, as the mass on the other side of the black hole is closer to you than it would be on the earth. This difference can be so extreme that it would cause your feet to experience a much higher gravitational force than your body, causing them to tear of your body and spaghettify. The atoms will be torn from there bonds creating an atom wide stream that would flow toward the blackhole. Essentially Blackholes are so extreme that even if they don’t “suck” like a vacuum, they have such great gravitational force that if you were close enough, it would feel like you were being Sucked in.