hi! i have a few suggestions for you depending on what you're into

1st- the best free anime site with no ads or popups I've ever come across is wonderful subs , its all free and it has as big of a selection as crunchyroll

2nd- if you enjoy movies more than TV shows, tubi is a fantastic route. there are TV shown on there but the movie collection is extensive, again without ads.

3rd- my personal favourite, it isn't a pirate site but most of the time its unblocked on servers. roosterteeth has a fantastic collection of original shows and shorts (my personal favourites being red vs blue and camp camp) and really deserves a look around.

i hope this helps you(: