So if anyone is STILL having any problems with Doc.Rose these are the things I did in order to avoid him.
1. It’s already been put in the comments section so I’m not going to type it again but like so many people have said, you NEED to find all the clues and the comment below mine is exactly what you do.
2. Now I don’t know if this is the choice you HAVE to make but what I did for chapter 6, when Papyrus asks us to stay at the restaurant was when the first choice of either leaving or staying appears, click on stay. Then when you get the choice of leaving or staying a second time, click leave. Ralsei and Chara will come with you.
3.Once I did this I managed to get the choice of visiting the apartment of Mr.Scott again. The choice visit him after or before your morning run appears, click BEFORE.
Again I don’t know if you have to do these choices but these are the ones that work for me. Goodluck!