If a Google Drive link for 'Comic 8' (2014) is shared, does it guarantee the full movie is present and in good quality?

No, a shared Google Drive link for 'Comic 8' (2014) does not guarantee the full movie is present or in good quality. The uploader might have only uploaded a portion of the film, or the file could be compressed significantly, leading to poor video and audio quality. It's also possible that the file name is misleading, and it might not be the movie you expect at all.