eh you guys really think it is that simple being Subaru ka?
death resetted his physical damage, but not his mental damage/stress. stress builds up to the point he kenot tahan = outburst at emilia earlier in the arc
he dunno how to express himself better, dunno how to explain indirectly how he know stuff that he learnt during previous run etc. want to explain directly? *redacted due to spoiler* prevents that from happen
this leads to ppl like emilia kenot fully understand why Subaru acts like that
I mean, you guys annoyed at him ranting a lot in this arc, but I ask you guys, do you really can maintain logical thinking sense when in extreme stress?
anyway, those that annoyed with Subaru will be happy since he's better in arc 4... then again that won't be animated at least in this 2 years unless somehow nezumiironeko sensei can magically write arc 4 ln version that fast (He already pretty much halted wn progress atm)

hakugei fight probably starts in ep 20

edit: and oh, there's a 'if' situation chapter in arc 4 (or was it arc 5? can't remember when *redacted* 1st appear) where what if Subaru doesn't care at all what happen to him and just abuse rtd nonstop to solve everything... it's.... I rather die than being that kind of Subaru