I would say there seems to be a hole in some legislature systems (Israel, Germany, India?) where the thresholds required for various functions seem unlikely to

I would say there seems to be a hole in some legislature systems (Israel, Germany, India?) where the thresholds required for various functions seem unlikely to be attainable with certain vote total splits between multiple parties. And in those times, voters are unlikely to defect from parties just because. Ergo, there's a succession of very weak governments that rapidly collapse. Which doesn't seem great for governance either. Feels like a perfect system would have a better 'there is no mandate attainable, so no one gets power but a shared government is forced into office for minimum X years' numerical escape hatch.