This isn't really a problem with Bitcoin, and should not make Bitcoin look bad. Bitcoin is primarily used in these because there are automated set of tools that help you create malware (e.g. ransomware) and they just take a % cut of the Bitcoin gathered this way. If the attackers were after better anonymity and not script-kiddies, they would not be asking for Bitcoin.
Here is an example of such a website called
Tox. However, this website was on sale the last time I encountered it. I'm sure that there are plenty more out there.
I sat their red faces, because he blamed this "Bitcoin" technology for what happened to him.
A ransomware attack is ridiculously easy to mitigate with a backup (in comparison to other advanced malware). You just need to wipe everything and restore via a backup. If you don't have a backup, then the only one that should be blamed is yourself.
Normal backup is not good enough. You will have to do full backups daily and weekly and monthly and store them offline. If you do
incremental backups, and the Malware is replicated, then all your preceding copies will be infected. This way, you can go back to previous
copies, until you find a copy that were not infected. Some people just overwrite their previous backups and then include the Malware in all
subsequent copies. { Then they cannot go back to previous "clean" backups to restore }