no... why?

I say yes. 2016 is the worst year in my whole life, because this year changed my whole life for me, because this year is the Zootopia year, where Zootopia premiered and is a massive hit to all furries, scalies, Pokefurs, and other furries alike from all over the world and all ages.

What was the reason that 2016 was the worst year ever?

Too much bad movies, bad shows, and too much politics stuff.

Was the multiple deaths of celebrities (like David Bowie, Alan Rickman, Prince, George Michael, etc.) one of the reasons why 2016 was the worst year ever?

Yes that too also.

I'd say it wasn't the worst but it was second worse, mainly for the reason of soo many celebrity deaths.

Beats me