Well, take the positive side of the anime. Probably the sales of the manga will increase because of how bad the anime adaptation is. Still, feels bad for the mangaka/author who make this decent art.
This manga is great for you who is waiting for your favorite list but don't want to do anything beside reading manga. Its has mediocre storyline but you still can enjoy it since the art style and the action cut is quite good. The author/mangaka has potential sadly the anime distain their names. Its sad knowing that manga such as "isekai smartphone" gets a better anime adaptation than Ex-Arm ( sure it would still be bad but atleast it would have been much better than what we have now)