Ah, I see! Thank you for clarifying ^^
The jumpscares/Dead Ends actually get explained in one of the links from my previous comment, but the main reason they exist is so that the narrative can connect seamlessly between the days. 14DWY's storyline is actually rather linear — despite the amount of choices available — and it follows a strict path. The only way for Day 3 to connect with Day 4 is by accepting Teo's offer, and each Day needs a Dead End for consistency and replayability. If you get more than one Dead End, Ren will say something different each time.
I figured it'd make more sense for players to get the Dead End by failing to progress the story during a pivotal moment — rather than not inviting Ren over. If that were the case, players who prefer a slow burn (or want to invite other characters) would only be punished for their choices.
Also, it shows that even the safest of choices have consequences! Going to Angel's apartment in Day 2 won't result in a spicy scene, yet it will result in a certain character's death. Sometimes the most obvious decision isn't the best one! >:3
I'm... not exactly sure how to implement your feedback into the game (I don't think sleeping with Ren and then immediately getting the Dead End scene would be a good idea /pos), but if I manage to work something out, I'll see what I can do! Thanks again for your suggestions!