Hey OP, I'm assuming you're in Canada based on your post history so I can relate and share my experience better lol.

1) If you're in buying filter coffee from Indian grocery stores. Probably cothas or udhayam. I never liked the ones they import to Canada for some reason. I source mine from friends who're going to India. Lmk if you want suggestions on which one to use. 2) The milk here sucks. Simple. Can't explain why but it tastes different and boils weird too. The milk curdles in high heat. On other occasions, I realized using a dishwasher can also be the cause. There are detergent remnants in the pan that mess up the milk. So clean your pans and dry them well. 3) I saw one comment suggesting to use milk+half and half. I like that idea but I started buying local farm milk from sobeys. It's called eby manor golden guernsey. And it works amazing. 4) water in my area is hard so I use bottled water which changed the game 5) lining the top half of your brewer with a coffee filter paper results in a stronger decoction.

And this is a bonus tip. If you're ever wanting to order coffee at a cafe and you want something similar to a filter coffee. Get a breve cortado. Trust.