It is a complex topic not just because of many different views, and I will be honest here with Leo's video. I watched it, and also liked it because he felt much less all over the place. More calm/adult and less giggle. He's in most parts correct with his assessments in this video, but also forgot mention a huge problem specific many females have on their phones and not just adults. Stalkingware.
That's a very serious problem that ain't automatic solved by any AV or the phones built-in protection no matter what OS. Many times the victim knows/suspect there's something wrong, but is too scared to even ask for help. We had genuine cases on this forum.
GData has a compressive guide on it with some good advice.
Today, ten organizations – Avira, Electronic Frontier Foundation, European Network for the Work with Perpetrators of Domestic Violence, G DATA Cyber Defense, Kaspersky, Malwarebytes, National Network to End Domestic Violence, NortonLifeLock, Operation Safe Escape and WEISSER RING – have launched...
www.gdata-software.com
stopstalkerware.org