Question! how accurate are the Gladiator films and what did they get right/wrong?

im writing a book that is heavily inspired of the time the gladiators and its politics. im watching the film Gladiator (2000) to draw inspirations from Maximus but im also unsure of what is Historically accurate and what isnt.

plus im doing all the research i can on this time period, but finding a lot of contradicting information and unsure what to use.

if anyone could help me, id be grateful. thank you.