Depends on what you classify as "competition".

Theft, sabotage, ad hominem attacks, even murder, could all be considered "competition" if your ethics and morals are on a different plane.

So saying there is nothing wrong with competition as a blanket dismissal is a bit myopic.

Are you accusing Rocket of any of those? They're famous for cloning business plans, but I wasn't aware they went beyond that.

IIRC Agriya was much popular compared to Rocket Internet in this business

That depends on the circumstances:

Their salaries, too, put [competitors] in the same state with a merchant who attempts to trade without a bounty in competition with those who trade with a considerable one. If he sells his goods at nearly the same price, he cannot have the same profit, and at least, if not bankruptcy and ruin, will infallibly be his lot. If he attempts to sell them much dearer, he is likely to have so few customers that his circumstances will not be much mended.

-- Adam Smith, Wealth of Nations, Book V, Chapter 1.

https://en.wikisource.org/wiki/The_Wealth_of_Nations/Book_V/...