What are the weaknesses of wegners theory?

Wegener's theory of continental drift faced several weaknesses, primarily the lack of a convincing mechanism for how continents could move across the Earth's surface, as he proposed they drifted through the oceanic crust. Additionally, his ideas were met with skepticism due to the limited geological evidence at the time, and many scientists favored the then-accepted static Earth model. Furthermore, Wegener could not adequately explain the geological and fossil similarities between continents, which later required the development of plate tectonics to provide a more comprehensive understanding.