I don't think the engine itself is buggy, or at least not all parts. Source 2 has been used in Dota 2 since 2015 and they also shipped Half-Life Alyx using it i

I don't think the engine itself is buggy, or at least not all parts. Source 2 has been used in Dota 2 since 2015 and they also shipped Half-Life Alyx using it in 2020; neither is consider particularly buggy.