Firstly, I doubt anyone is going to read this comment.
That said it doesn't really matter since what I wanted to say is effectively said on the first page #8.
But I do want to add:
If the newly awoken S-rank dragon can wipe out the town in the few seconds it took him to run to the edge of the cliff allowing him to see the town, likely by simply LANDING ON IT, then there is ABSOLUTELY NO WAY he could have done anything to prevent it.
His fighting woke up the dragon? Unlikely. As the other person mentioned, the wyverns alone would have done that if it was simply fighting noises that woke it up, especially MELEE fighting noises (massive explosion fighting noises? I could comprehend that, but not melee or bow/arrow).
Basically, he walked to the top of an active volcano, poured some water down the crater onto molten lava, somehow survived the volcanic blast cloud (can't remember how it's spelled) that coincidentally happens immediately after, then blamed himself for the volcano erupting. The people at the Guild who blame him are also delusional or simply don't like his fame...
Finally, if he quits being an adventurer how does he expect to support the children? I suppose THAT will be explained in the next chapter or later...