@Emerane You will likely enjoy the rest of this webtoon a lot. However I stand my point. When you'll be reading this you should have catched up with the release, and know what's coming for our hero. The fact that he HATES his so called "companions" is not trivial a all, it's a key part of the story. Basically the world he's in is a stereotypical RPG setting thingy, with all the tropes and motives of a "classic" J-RPG, but something went wrong, REALLY wrong. In essence the MC is trapped into this world against his will, and the system likely has some major failure that make it work pretty much against the MC in every aspect possible. The fact that he is still able to progress, somehow, is only due to his knowledge. And oh boi does he know that his "companions" are hell-bent of making him suffer. He went through TEN years of almost constant abuse, both physical and psychological. So I'm very glad he killed Silvia so quiclky but it still constitutes a kinda big plot-hole to me. He should have get rid of her in another way because killing her, even with some excuses, is just not logical at all.