Typical reincarnation plot with horrible execution. The animation quality is outdated by at least a decade, failing to impress with its lackluster visuals. The character design also misses the mark, contributing to an overall subpar aesthetic. Both the voice acting and sound effects are disappointing. The sound effects, especially during fight scenes and moments of alchemy, are underwhelming and reminiscent of uncomfortable, strained noises made by a constipated uncle rather than dynamic action sounds. The plot progresses without any significant impact on overall situation of the main character. If the creators used the runtime on actual events instead of side characters expressing "Oh! is that so?they're so good/bad', the series would be much more bearable.

Character development is virtually non-existent, and the portrayal of power levels is inconsistent and unconvincing.

The main character remains useless, both before and after his reincarnation.
The only reason others seem to value the MC is because they don't know of his previous life. Otherwise, he'd be less significant than even a side character.

A compelling main character is typically defined by their actions and how efficiently or differently they execute their plans into fruition.
On the other hand the MC here is a fortunate bootlicker, who can only make a few pills to make others envious to gain from his future exploits. In combat situations, he appears powerless, relying on others for protection and glow like a glowing radroach from time to time.
After ten millennium of experience from his previous life, one would expect more substantial growth and capability, but unfortunately, this anime falls short in that regard.

From everything I have noticed, the word 'unreasonable" doesn't exist in that universe for all the bs that gets thrown into the viewers.