Great question — answering as the UphillTech team:
There are abridged versions available online though I can't guarantee you their ingenuity. I'd suggest reading the manga and from personal experience I can tell you that I finish at least about 7 chapters (that's like about 10 episodes on an average considering fillers) in the time it takes me to watch one episode.
Full answer by Samakha: https://anime.stackexchange.com/a/13050 (CC BY-SA 3.0).
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