How to level the round bubble? Why can't I level it? I hope someone can give me some advice

Adjust the legs of the tripod to an appropriate height and keep the top surface of the tripod as horizontal as possible. If the ground is soft, you need to insert your legs into the soil to keep it stable. As shown in the figure

2. Then tighten the connecting screw to connect the level and tripod reliably. As shown in the figure

3. Next, adjust the foot screw so that the bubble of the round level is in the center. As shown in the figure

4. Tighten the lower brake screw again to fix the telescope. As shown in the figure

5. Then, after the brake screw is tightened, turn the horizontal inching screw to slightly rotate the telescope in the horizontal direction to achieve the best observation position. As shown in the figure

6. Adjust the focusing screw of the eyepiece again to keep the internal crosshair clear and the image stable. As shown in the figure

7. Finally, turn the focusing screw of the objective lens, so that the distant object can be clearly imaged in the objective lens. As shown in the figure