Uh. Crunchyroll Subs are the same as HorribleSubs. Except for when they're Funi or Daisuki. HorribleSubs just rips the subs from the simulcasting sites for distribution.
On the rare occasion that they do sub something themselves, it's... horrible. Koutetsujou ep. 2 was a good example, with the DAIJOUBU and (idk what measurement).
Sorry but you missed the boat there. There are no "rare occasions" that HorrbleSubs decides to sub something themselves. They are a bunch of computer programmers who know how to automate video stream ripping, and happen to like anime. They lack: translators, scriptwriters, timers, typesetters and encoders. Just having "subs" in the group's name doesn't mean anything. None of those skills are needed for their actual operation, so it stands to reason that they would lack personnel with those skills.
Ok, in the case of Koutetsujou no Kabaneri, I'll bet you that it's a
simulcast if HorribleSubs has it. Because they only rip simulcasts: that's why they never have the OVAs, specials or movies for things. First step of research is fansubdb.com to find out who is simulcasting any current show. You can see that Amazon Prime Video have the rights. Checking it out
on Amazon, you can get the air dates. Cross-checking with HorribleSubs, you can see the dates are the same. So they're getting it from Amazon.
With that, you can pinpoint the actual culprits of shitty subs for Koutetsujou no Kabaneri: big corporations like
Amazon who want to dip their feet in the anime market, and outbid the specialized anime companies like CrunchyRoll and Funimation for a select few profitable titles. It's no surprise some noobs like Amazon are going to produce below-par subs.