That’s what people often complain about and avoid this really healthy source of food. I went through that stage initially when I was boosting the level of fiber in my diet and adding a lot of beans, but the thing is that’s really only a stage, and once your digestion tract gets used to eating higher-levels of fiber, you won’t have that problem. In the meantime, things like Gas-X and generic digestion aids can help your upset stomach.
Beans are great because they are inexpensive, very filling as they are full of fiber and protein without all that many calories. A pound or two can last you for many meals and comes with minimal packaging when bought in bulk. Different beans have slightly different tastes and are best paired with different meals. Many don’t have a strong taste, and can be easily paired with basically anything. And you get a lot of fullness and nutrition out of eating those beans.