Dyslexic Blitzø

Is there anything other than the single shot of the text convo between Stolas and Blitzø that supports the idea that Blitzø’s either dyslexic or illiterate? I’m not against head cannoning him that way, of course, but to me that convo reads more like he’s intentionally texting poorly to show he doesn’t care. A show of emotional detachment. His biggest flaw is his fear of attachment, so this is what feels most plausible to me.

Are there any other scenes I’m forgetting? Or is that truly it?