Maybe I'm not being fair to this show as I didn't actually finish it, but that's because I actually just couldn't stand to watch any longer. Excepting the acting, because the actors did as good a job as they were able with the material, the plot, script, and characters were just bad. Some major issues I have with the show are:

Characters: Both main leads were difficult to tolerate, but what I really couldn't get over is how Bong Hee stalks Ji Wook for a good long stretch of episodes. I also wish if a kdrama makes a point to tell the audience that the female lead can kick some a*s, they should SHOW it. If they did later on and I just didn't get to that before I dropped, my bad. It just seems like the show wanted to have a "strong female lead" but then never actually made her be one. Not that strong female leads can't have vulnerable moments or flaws, it just seemed like Bong Hee was all flaws. I didn't find her stalking cute at all. I will say, as much as it was embarrassing to watch, I respected Bong Hee embracing her crazy ex gf status and reclaiming it in a way (until it got her to be a murder suspect whoops). Ji Wook I think I just didn't like because of how rude he was, and we share some polar opposite principles on the legal system and how it should and should not operate. That last one is just a me thing, though.

Overall Enjoyment: I'm sorry but what's happening in this show? From coworkers to murder suspect, to stalker, to business partners, to housemates...like I just was waiting for the show to be engaging and not forcibly have to watch. I think that was the problem at the end of the day was that I had to convince myself to keep watching and hoping it will get better. And I don't even mean in terms of the quality of the show or anything, but waiting until watching what was happening in the show not be tortuous and cringeworthy to witness. We literally just waited for Ji Wook to not be creeped out by Bong Hee in order for the romance to progress. And sorry but I just don't get butterflies from that type of romance.

Ultimately, I just could not keep watching Suspicious Partner. I felt like I was watching a trainwreck each episode of secondhand embarrassment. For me, nothing about the show was charming. Especially the whole cheating backstory with Ji Wook and his ex bestfriend and girlfriend. There was no character that was just fun to watch do their thing. To me, the entire main cast was just wholly unlikable and you can't really go anywhere if you don't enjoy watching any of the characters lol. I really don't understand why people liked this show so much. And this is coming from someone who was excited to watch it! But it is what it is and Chang Wook has the advantage of just standing there and looking cute for the drama to be successful. I just had to call it quits and stop wasting my time waiting to get to when I would enjoy watching the show :/