You can look at other sources to see how good kerala is doing wrt other states but I do agree the article over emphasised the good parts without any hint to it's bad parts
Kerala is one of the few states that managed medical supplies of Oxygen pretty well. In many other states many died because hospitals ran out of it.
Now, as for Kerala's handling of Covid, that was funded by state govt coffers. So Middle East money had a negligible contribution. What made a difference though is a history of preference for investing in social safety nets and basic infrastructure for people, such as schools, nutrition, hospitals.
It's the same story in east Asian countries where they had the SARS outbreak in early 2000s and so they were prepared for new outbreaks.
India has a lot of other issues, I grant you that the socialist ideology probably had a positive influence in some ways other than economics, particularly socially. But no offense, if you've ever walked the streets Trivandrum and other cities you know there are much more pressing issues.
A capitalist dictatorship will be every bit as horrible as a communist dictatorship.
Btw, for some historic context this part of India used to be extremely rich in the past by global standards, centuries ago. They became rich with international trade. Modern India is nowhere close to its wealthy past, the subcontinent as a whole produced the largest percentage of the world's GDP during Late Antiquity, surpassing China and all others!