I have two questions for the geeks and nerds over here.

Why is Mothra considered so weak, and why is Bagan considered so strong?

First of all, the kaiju who beat Godzilla and Kaiser Ghidorah dosen't seem so helpless to me.

Second of all, Bagan has like, no feats. What information do we have that proves, as so many have claimed, that he is even stronger than Destroyah, Ghidorah, or SpaceGodzilla?