No offense but if the idea of finding 5 candidates you can feel comfortable voting for is too much work, you shouldn't be voting.
Even if you could do both of those, will it hold up when the populist candidate loses and starts railing about how they have so much support, the best support, and the election was stolen from them by the elite-chosen sample?
In Netherland we have elections for "waterschappen" ("water council"), apparently our oldest governmental body and responsible managing surface water, dikes, etc. So obviously very important in a country like this, but I have no idea what the actual issues involved are, and yet I have to vote for these people.
[1] yes governments were weak and were replaced often, but that's a feature, not a problem.
As each member of parliament must necessarily represent the biggest groups in their constituencies.
So a decent size group scattered across many dozens of constituencies into relatively tiny groups would simply never get taken seriously without a strong executive.
For example, non-residents, tourists, diplomats, etc..
Because each group certainly has some real interests in common.
Also, I think Italy actually has a hybrid system.