China was Maoist from 1949-78, Maoism is poorly suited for building prosperous societies (although it's excellent at building societies in which everyone is poor and which are destabilized by mass campaigns over ideological purity every 10-15 years).
To understand this issue, you must carefully study Chinese society as it existed at that time. Evaluating the merits and demerits of Mao Zedong while setting aside the context of that era is inherently biased.
It is a complex matter. If you wish to explore it in greater detail, I suggest consulting relevant source materials.
When the COVID-19 pandemic struck, many national governments found themselves unable to cope with the catastrophe, and their entire healthcare systems collapsed. For a government, however, the critical concern is not merely the number of deaths, but the state of the surviving population. The panic among those who remain alive can trigger social unrest severe enough to completely topple a regime.
When a society lacks the practical capacity to address a crisis, "psychological therapy"—in a broad sense—becomes an effective tool for crisis management. This explains why, in various countries, governments resorted to bizarre rhetoric—such as the suggestion in India that drinking cow urine could cure COVID-19. There are other examples, but I need not list them all here.
While these measures may appear "absurd" to outsiders, they served as an effective instrument when viewed within the specific context of the local national conditions. At the very least, in the short term and within a certain scope, they succeeded in pacifying the public.
Now, are you able to grasp the issue of the "Great Leap Forward"?
As for the "Cultural Revolution," that is a separate matter. To either completely condemn or entirely endorse it would be narrow-minded. Everything has two sides; it all depends on the perspective from which you view it.
Faster decisions doesn't mean coherent long-term decisions. Vietnam and Laos are both one-party states too, but we don't have that decades-ahead consistency. Vietnam has collective leadership specifically to avoid one-man rule, yet its plans get revised for years, and in Laos most big plans change as soon as the funding or faction in the LPRP changes. So the long-termism you see in China is about state capacity, not just about having one party.
Which system should be adopted? There is no right or wrong answer.
A one-party system or a multi-party system? A democracy or an authoritarian regime? The true core of the issue is whether there are effective mechanisms in place to check and constrain power.
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Another question worth considering:
To this day, there are still countries in the world that operate under a system of absolute monarchy. Yet, international public opinion rarely criticizes their political systems.
Take, for example, Vatican City: the Pope holds absolute authority. But have you ever heard any media outlet criticize this arrangement?
Why?