Yes, the new economic reforms introduced by British rule profoundly disrupted and fundamentally transformed the old economic system of India. Prior to British intervention, India possessed a largely self-sufficient village economy characterized by subsistence agriculture, a vibrant handicraft industry, and a localized exchange system. The British, driven by their imperialistic and mercantilist objectives, systematically dismantled this structure to serve their industrial and commercial interests.

Key reforms and their disruptive impacts include:

1. Land Revenue Systems: The introduction of systems like the Permanent Settlement, Ryotwari, and Mahalwari commercialized land, turning it into a commodity. This led to the creation of new landowning classes (zamindars) and moneylenders, dispossessing traditional cultivators, increasing peasant indebtedness, and fostering a system of exploitation. For instance, under the Permanent Settlement in Bengal, many traditional landholders lost their rights, and a new class of absentee landlords emerged, leading to agrarian distress.

2. De-industrialization: British policies actively suppressed India's thriving handicraft industries, particularly textiles, which were globally renowned. Discriminatory tariffs were imposed on Indian goods entering Britain, while British machine-made goods flooded the Indian market with minimal duties. This led to the decline of traditional artisans, rendering millions jobless and destroying centers like Dacca, famous for its muslin.

3. Commercialization of Agriculture: The British encouraged the cultivation of cash crops like indigo, cotton, jute, and opium, primarily to feed British industries and markets, often at the expense of food grain production. This shift made Indian agriculture vulnerable to global price fluctuations and led to severe food shortages and famines, as seen in the Bengal Famine of 1770 and subsequent famines.

4. Infrastructure Development: While railways and roads were built, their primary purpose was to facilitate the extraction of raw materials from the interior to ports and to transport British manufactured goods to Indian markets, rather than fostering indigenous industrial growth.

5. Integration into Global Capitalism: India's economy was forcibly integrated into the global capitalist system, but in a subordinate role as a supplier of raw materials and a market for British goods. This created a dependent colonial economy, stifling indigenous capital formation and industrial development.

In essence, the British economic reforms transformed India from a self-sufficient economy into a colonial appendage, leading to widespread poverty, economic exploitation, and the destruction of traditional livelihoods, thus fundamentally disrupting its old economic system.