"Who is Dave really is?"
At the beginning we learn that he is a kind-warmheart, honest, naïve person and probably the most lawful/good person of the entire game and while not being so smart like roswell he's posessed a great judge of character. However as the story progressing I start to noticed something felt off, his depression-arc is a bit long and repetitive and it's also weird when he pushed eveyone away while saying 'Hey, if you want to talk just talk to me, anything is fine' when spending time with route partner.
Dave is a genuinely good guy, so it really strange how he acted in bad timeline, I understand that the writer want to show us reader what Dave's personality will change in different timeline but his change is a bit overdone.
[[SPOILER in worse timeline]]
Before Dave reach worse timeline he is already sad and depressed, after someone death he starting to snap at everyone around him, his kind considered personality shift to delinquent and rude to his friend who still worried and care for him, now do you think a genuinely kind person like Dave will acted like that way to his friend? If I were Hoss I probably slap Dave already. I mean just because logically Dave should change based on what going on around him, doesn't mean that Dave should changed into completly different person, at least stay true to his character.
I think the most reasonable and make sense way is he supposed to change to be more quiet, meek, subdue, low self esteem to suit his nature. When Dave told Sal he's better be dead, his feeling is hated and Resentment but in reality he should be saying 'I wish not to see you again' then breakdown infront of Sal becasue his feeling should be 'fear, confused, sadness of seeing his friend killing another friends'
I hope I can express what I meant to becasue I'm not a native so writing and putting word into sentence is very hard and I'm not good at grammar neither . _ .