Adiyen can understand your concern. Please allow me to share my perspective. Recently about a month ago even I visited Tiruvallikeni. Although it is a Divyadesam, the place surrounding the temple was not clean. The surrounding place is not being maintained properly.
The reason why people are not interested is because, most people are either confused or don’t even know what is given in the sastras. And although preachers like Sri Velukkudi Swami, do their best, it is still in the hands of his followers, i.e., us to propagate the message to others.
Nowadays, I see some saying that “People are not caring for Hinduism” or “People are converting to other religions”,etc. But I’ve learnt that there is no point in simply saying these things. We must try to propagate the correct thing given in the scriptures.
Another reason could be the false propaganda propagated by media and some ‘politicians’.
By the way, even if we say that we want to protect ‘hinduism’, there are a lot of ‘hindus’, who misrepresent the sastras, or don’t even quote anything from Vedas. This is a very serious concern now. They put the title of their lectures like “Mahabharatha in my perspective”, “என் பார்வையில் கீதை”, etc. Which means it is not authoritative. They don’t even quote anything from the sastras. So a large lump of people follow these people. And unfortunately I have to face these kind of people in my life frequently.
One of the followers of such people even came to me and forced me to say that “Accept that Krishna is a villain. Karna is the hero of Mahabharata”. Now this is definitely nonsense. And this is also offensive.
I am sorry as I think I drifted away from your main topic. But if anyone is reading this, I would also like to know your thoughts.