What?!? Extraction speed is normally just limited by hdd speed, no clue why it would take so long on your machine.
Unless your file is really large and your the connection between source and temp folder is really slow this should be relatively fast.
Wild guess: Try to create a separate folder Hybrid can take as temp folder and specify it under "Config->Path->Default temp path".
If that doesn't help my only guess is that some other program is seriously slowing down transfer speed on your system.
(AV Program? Some Indexing tool running in the background, or something similar?)
-> something is really strange with your setup.
Cu Selur
Ps.: For me extracting subtitles from a Blu-ray over my network takes a few minutes (~3min), since the whole Blu-ray has to be transferred, but not hours. (independent of OS, roughly the same speed on Mac OS X 10.13, Win 10, Linux)