I had been to Kanyakumari some 30 years back and was looking forward to a visit last week. Yet, what I saw there was appaling.
First of all, the beach is gone. What used to be a nice sandy beach has been lost to erosion (I am told). Rocks and high walls border the sea, and one can only look down at the sea from high above.
Secondly, even without a beach, the place is overcrowded. Lots of vehicle and lots of noisy, raucous people (on a Sat evening).
Thirdly, due to this crowd, the ferry trip to the Vivekananda Rock Memorial took ages, half and hour wait heading out and a full hour wait, on the rock, to head back. The memorial was never anything great to look at and hence the ferry ride is simply not worth it.
Fourthly, the statue of Thiruvalluvar (whose pithy two line poems I adore) looks quite terrible.
Fifthly, Tamil Nadu in summer is unbearably hot. Stay away.