Imo you have mentioned you break down problems well and are undervaluing that part tremendously. Most interviewers are looking for that and is not exactly as easy for others especially in an interview setting especially when you’re desperate to convert that opportunity. I’m assuming you’re relatively confident and relaxed in these interviews as you’re not desperate yet.
You are definitely in that mode ‘If I’m good at it, can’t be hard’. Which is understandable, but it is hard.
Plus, it helps you have 3 years of work ex to talk about. Can cover up in case you weren’t good at cases and other PM interview template evaluations.