Anecdotal evidence: within my circle of friends, Flipkart use has dropped considerably over the last couple of years. Personally, I haven't made a single purchase off Flipkart in 3+ years. Their prices are now usually higher than Amazon and they don't have the "long tail" of products I want.

Myntra, which Flipkart bought, is still my go-to source for buying clothes. It helps that Myntra has really the best user experience of all the other apps. Their delivery is incredibly fast too - I ordered a shirt last night and received it today morning!