True, I actually never watched the anime I only read the manga, in the manga at least you have a few melancholy moments in the beginning but after Frieren starts the journey with the rest of the group the melancholy is more subtle at the end of chapters/archs.
Endro~! brings back memories. 2018/yearly 2019 is the years that I had time to watch all the animes in the season. Greats animes like Mahoutsukai no Yome, Violet Evergarden and etc was released at that time. Endro~! debuted in the last season that I could watch everything, after that I slowsly dropped animes because of my lack of time.