Paytm UPI was the best option for me and now I'm using Bhim which is much more complicated. Paytm had its own bank and it was easy to add and withdraw money which is not offered by other UPI alternatives.
BHIM app is good but is overfeatured and is often clanky to use. In that sense, GPay and Phonepe has better interfaces and I use GPay almost regularly to make payments hoping for some good cashbacks. They used to give away few single digit INR value cashbacks directly back in 2020 but they dont anymore.
Still I keep getting hopeful I will get some one fine day.
As far as Paytm is concerned, I can see them selling off to someone else and moving on.