nothing more than

nothing more than (something)

Only or exactly something; nothing higher in degree than what is described. Despite the huge public outcry, the company received nothing more than a measly fine and a slap on the wrist for their exploitative business model. I'm fine—it's nothing more than a paper cut.
See also: more, nothing
Farlex Dictionary of Idioms.

nothing ˈmore than

(used for emphasis) only: The injury isn’t serious — it’s nothing more than a sprained ankle.
See also: more, nothing
Farlex Partner Idioms Dictionary
See also:
  • nothing more than (something)
  • nothing of the kind
  • nothing of the kind/sort
  • nothing of the sort
  • nothing
  • be worked up about (something)
  • nothing in it for (one)
  • No news is good news
  • be worked up over (something)
  • worked up about (something)
References in periodicals archive
Du-More's dental products are made of a plastic that biodegrades to nothing more than carbon dioxide, water and humus, without leaving fragments of petropolymers in the soil.
Fans expecting a peach of a dance album will discover that this is nothing more than a bitter-sweet raspberry which leaves a very bad taste in your mouth.