Are you using an SSD? One of the most common mistakes is not using an SSD because of the nature of how Bitcoin downloads but then validates and indexes the data, it is pretty disk intensive and that tends to be the bottleneck.

I would expect that in a week you should be done, but 50% doesn't mean you're half way there unfortunately. I would expect maybe 2 more weeks at that rate 😬. I may be wrong, you may get lucky.