The dubs in general are pretty bad, but there are certain exceptions like the ones mentioned before.I find that English voice actors do not put the same emotion as the jap voice actors do.Even the pronunciation is kinda bad on the English dubs and it makes me cringe.
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But yeah the One Punch Man dub is looking to be decent
Probably but the good thing is, I'll never know what I'm missing out on. Because I don't watch it, I don't know how it usually sounds. I couldn't live passed 5 minutes of that 'torture'. I prefer my English dubs <3