Exactly, it's a decent series, but it's mediocre at best and easily forgettable. I often lurk through a couple of big anime community like Crunchyroll and Reddit and rarely is Hetalia ever mentioned. Only place where I saw Hetalia quite a bit was at an anime convention at my city, and this is the place that is filled with FMA, DN, SAO and AoT. Nothing special enough for Hetalia, especially being an earlier series that most people forgot about.