Your beans & rice were bland because of the amount of water used in preparing them. When that much water is involved, you really need to season the heck out of things. You can also add salt to the water when you soak your beans so they absorb some of it, and add seasoning to the water when you make the rice, if you do that separately. If you're suing seasoning packets, you might consider doubling up on them, depending on the size of your batch. It's kind of like chili, most old-timers don't consider chili fit to eat until the third reheating.