What would be an appropriate phrase that indicates something has been used too much [closed]

For example, let's say someone describes a simple physical theory and uses mathematics heavily in their description, in such a way that it makes the whole description quite confusing.

I want to say something like, "s/he has beaten the shit out of mathematics in her/his description" to indicate they have used mathematics unnecessarily much.

What would be possible phrases that can be used in such a situation.

I'm looking more for slang than formal language.

Solution 1:

Taking a sledgehammer to crack a nut

would seem appropriate.

See Collins for explanation.

Solution 2:

How about over the top? From Lexico:

over the top: To an excessive or exaggerated degree.

Your example:

S/he was over the top in her use of mathematics to describe X.

For extra emphasis, you could say s/he was way over the top.