It's not Google's fault per se.
They can't check ALL ads to make sure they're legit and don't lead to malware.
If this spate of phishing continues I reckon they'll go the way of Facebook and just ban all crypto ads altogether.
I agree that this is not the only fault from the side of Google,every user of cryptocurrency should know basic things-and one of them is how to recognize legit and phishing site.But they have option to report such sites,and I report that opensource-electrum months ago with detailed explanation what is the problem-they thid not do nothing about that.
They should check what they allow to be advertised, since they not do that I consider them partly responsible for great damage to crypto users.It is possible that they know very well what is happening,but they do not care at all.