I don't know what to say... Maybe it's not a game for you...
But I will try to explain some things and why the bug ruins the experience, in my opinion...
Yui is a girl who is broken ... if you advance her story, you discover that she has many responsibilities, suffers abuse from her peers and has always been very lonely (Her only partner has been Kaede, but she's also her rival)... She can see things that others can't, because she's a Nova, and that also makes her one of the four possible candidates to replace the mayor of Argleton.
She doesn't see the future or the past, something Sasha can do, but she knows about the main character, if it is explained later in the story.
You don't care about Anton's death because of how shocking he was. You care about everything else... What does that mean for each of the girls? How will Prim react to losing her brother? What will happen to Yui if you're another candidate and an antagonist in her story? What does Sasha want to achieve? How does that affect Maxy and Mary?
The crash is important too: Since, with that, the mayor is keeping Lucky from finding out the truth... But you as a player know the truth and so does Sasha. From that moment the glow Sasha talks about covers the background of the mainmenu, you can see other things. The real story is activated.
About Doggie, it doesn't matter at this point, I don't think you'll find the story interesting, I don't want you to waste your time playing something that's not worth it