Besides FromSoft as perhaps the exception to the rule as a subsidary to Kadokawa, private companies seem to be keeping their shit together fairly consistently. Larian and Wube are a pair of solid examples, although Valve is probably the most outstanding example.

Game developers and publishers start shitting the bed when they IPO and need to juggle the conflicting interests of managing investor relations as well as customer demands; that or when they're acquired and turned into a subsidiary.