'Finally'? How many times did you try?
I tried three times on a much earlier version and three times this weekend. Note that I was still playing on the lowest difficulty. I think I'll move on to a higher difficulty when there's a release candidate.
- How hard was it? At which date did you complete each UHV (approximately)? I usually do it 10 to 20 years before the deadline, if you did better i might raise the threshold.
Did the first goal some 20 years early. Cut the 2nd one pretty close (1226), but I skipped one great work in favor of bulbing music tech which turned out to be not an effective trade-off. Delayed the 3rd one by founding an extra city. But the 3rd one is not important. If you get the 2nd down, you win.
- What did Delhi do on start? Did they attack you or the rest of India?
Actually, I saved my horse archer to kill them when they moved their stack out of Delhi bc they would have steamrolled me with their starting units. They respawned on their next turn (flips) and vassalized soon after I made peace with them.
- Was it fun? I'm just asking because there is some hate against their UHVs.
And I'm still part of this hating.

Seriously, it was rewarding to finally succeed after trying different approaches to this scenario. But gameplay-wise, nothing much was happening except assigning artists and setting production to culture or culture-generating or health-generating buildings. Gokturks might be a threat on a higher difficulty and I may try letting the Ghorids live and fighting them. The 3rd UHV might not be as trivial, then. I guess the 1st one is redundant bc it's just a step on the way to the 2nd. How about replacing it with 'Sack 10(?) cities with Hinduism in it' or 'Destroy the Hindu Holy City'? This way the player would have to worry about making units at some point.
On the other hand, one could argue, that there is even less going on for Korea and all the island-based civs... But I still did enjoy playing them. Probably all this culture-mongering to the extreme is just counterintuitive to the casual player.
Not much. I was running science at 10%/culture at 50+% most of the time. This helped with bulbing music and I also got the other tech for the UB eventually. But like I said, the UB comes too late this way to be any help. I was able to trade for canal systems. That was useful, indeed.