after finishing modeling the sides, i realized that my mesh had a problem, Tho i don't know what caused it
Hi Biruk,
I know what (or actually who) caused the problem: it was you 😉
But I can't help you, if you don't provide more details. Try to describe the problem. One or more screenshots might be helpful as well.
Or maybe first try the two main problems beginners run into:
Double Vertices: Select everything in Edit Mode, with A and then M > Merge > By Distance.
Inconsistent Normals: with everything still Selected, press SHIFT+N.
Those two things will fix 90% of all your modeling issues.
EDIT: I see you provided a video now.
The problem is, that the Edges are too close together, you'll need to Edge Slide (shortcut G, G ) them away from the 'point"...
if you activate the wireframe function, you can also see the “bevel edges” in object mode, perhaps you will then understand this a little better