It's somewhat better but heavily depends on what you play and how you play it. Empirically, it's better as now I only find toxic players every 20 games or so, when before it was like 1/2. But I also recommend to just mute everything and everyone and stick to ARAM if you don't like toxicity.
I recommend it a lot, it's very entertaining for team fights and quick tactics, rather than waiting 20 mins for the fun to begin or waiting for your JG to do something in SR