how bad exactly is monster energy?

i’m in the UK, not sure if the ingredients vary much but this is something to note.

so i’ve had it parroted to me that monster energy specifically (and other energy drinks, but i only enjoy monster so we’ll stick to that) is basically poison.

i’ll preface by saying that from my extremely uneducated position, it looks to me as if the sugar is the biggest problem with monsters.

now, if someone were to drink a monster daily, i could see the issue with the sugar intake, as a single can itself exceeds the daily recommended intake.

but, that’s not my situation anyway, i’m interested

in any potential concerns about 2-4 monster a month.