The coming of the rains is a relief from the worst of the heat, and is welcomed across India. It is a great time to stay home, relax and watch the rain come down and all the vegetation turn bright green. If you don't have to move a muscle, and there is a fan swirling overhead (*), the heat and humidity are not at all bad, and who cares about the mud outside.
If you have to go out and see the tourist sights, well, that's a different matter altogether.
For a more positive view, read "Chasing the monsoon".
(*) I lived there before AC was a thing, and anyway AC isolates you from nature.