Although I agree that a front page like that gives a bad impression, it sounds to me that you're trying to treat the symptoms, not the cause.

If there are so many downvoted and/or closed questions, we should figure out why this is happening and attack those causes, in order to prevent it from happening - or at least minimize it (I don't have a suggestion, though, perhaps it needs a separate discussion for that).

Hiding poorly received questions sounds to me like pretending the problem doesn't exist. We should attack the problem's causes instead, in order to make sure users know how to create good quality content before posting, and ideally there would be no need to hide anything...

hkotsubo‭ Kind of agree but I would do both. Showing only positive content to visitors is okay, after all they are likely more interested in reading something useful.

However, if people register you want to show them all the content, so they will discover the negatively scoring content soon anyway. We should look at the distribution of scores for new question and not only at the amount of new questions and if there are constantly badly scoring questions we should do something. The average/median score of recent questions should be a site health indicator and we should try to maximize it.