: Since your file is from the RARBG group, downloading a subtitle with "RARBG" in the filename increases the likelihood that it is perfectly synced to that specific encode.
You can find and download the matching subtitle files (usually in .srt format) from these reputable subtitle databases: subtitle Eternals.2021.IMAX.1080p.WEBRip.x264-R...
: Most WEBRip files are 23.976 fps. Ensure the subtitle file you download matches this frame rate to prevent the text from drifting out of sync. : Since your file is from the RARBG