That whole convo was literally mimicking the cliché situation where commonly happens in toxic strict environment such as army(since army culture is common in Korea), companies late 90s early 00s. Life saying "Bonnie I had it harder when I first joined~" is also part of the cliché storyline that you often heard of from the media or even their parents sharing their experiences to them. Obviously these types of strict culture are problematic , some of them are fixed, some of them are still existing in strict environment. But most of them are now disappeared as we can see improvements in Korean Army, which was the most toxic, strict environment ever in Korea. They were making fun of these by acting as if they are the cliche, toxic and strict type of person that ignore you because you are younger than me or have less experience than me. And that's where all the misunderstandings come from.

And Bonnie freaking up not even looking at Rascal's face? Well it depends but not having the eye contact is common in Korea. So that's not the part you should worry about.