It nearly worked
To be fair the central core nearly made it back intact, this is merely proof that the technology can be improved.
One intriguing thing I did read is that the Falcon engines are made of materials that did not exist in 1967. A lot of the problems with the Russian N-1 were simple engineering issues such as not having filters on the fuel line(s) and with time could have been fixed.
The N1 had a lift capacity 1.3* that of the Falcon Heavy but was not intended to be reusable.