If you're a person expecting blazing and blasting action, this isn't for you. there aren't any character for one to self insert into (unless you really wanna self insert into frieren while dismissing her personality), no major plot twist elements, yes it is thriller and Frieren does aura farm in the later episodes but it's just the right amount where it doesn't feel like the production is trying to deliberately make the MC aura farm in every encounter (Solo leveling *cough cough*. sorry, not sorry).

This is a slow burn, steady paced plot purely for character development, slow side questing, and chilling. Personally, I loved it and the soundtrack is actually peak. it doesn't have any of the annoying anime trope with cringey anime expressions with character being loud and obnoxious.

Yes, it's not for everyone and it depends entirely on the mood of the watcher. like if you watched emotional and wholesome stuff (say violet evergarden) and want more emotional and wholesome stuff this will press all the right buttons. But if you're sitting after binging AOT expecting thriller and chaos off the bat with hyped pacing, you'll probably never get what you want. It's a slow dose of dopamine that does test your attention span over the period of 28 episodes while rewarding you greatly after 20 episodes with amazing/peak action which you see the edits of (Frieren vs Frieren was as peak as it could get).

As for the people that complain about flashbacks, the flashback are just as important that emphasizes Frierens Retrospect of a mere 10 years holding such weight and important nostalgic value compared to the eons she's lived. It's an elf's perspective of "don't be sad because it's over; be happy because it happened" and it's beautifully portrayed.