Actors doing biopics overwhelmingly get praise and awards. What were the times they didn't?

Posting this after seeing Timothee Chalamet getting praise for his Bob Dylan performance. But in general I've noticed time after time actors making easy dunks by doing biopics. Why is that?

Why do they get it so easy?

A lot of times, they're not even mimicking the person they're impersonating. I can think of Jesse Eisenberg as Mark Zuckerberg. Mark definitely never speaks that fast.

I have enjoyed many of these biopic performances though. Notable ones for me are:

Meryl Streep as Margaret Thatcher Forest Whitaker as Idi Amin Christian Bale as Bob Dylan

But I am interested in knowing what biopics had actors who did a terrible job?

For me the worst one is Ashton Kutcher as Steve Jobs. One of the worst things I've ever seen. What are our worst top 5 biopic performances?