I have sort of similar experience with that sort of thing. Which is kinda why i dont like playing ditto matches. I found the way i play can have trouble against someone who is playing the same character but spammy and defensive. Spamming smashes, which generally have longer range and are faster. Also i find advance play tactics dont work too well against new players either. Since the way they play is different from advance players, which may cause you to make alot of misreads, and possibly walk straight into attacks.
Or it could just be beginners luck.
Or it could just be beginners luck.