The Youtuber you mentioned sensationalises anything. Bangalore is like any other Indian Metro city where the people come from all over the country, are generally well behaved, young, educated, curious, openminded. Amenities in Bengaluru are plenty. I have lived in Kolkata, Pune, Mumbai and have flatmates who lived in Delhi, Gurgaon etc. I prefer BLR to all others.
There are issues like infra and water. And there are local political issues of language (which I feel is reasonable). But overall, life in BLR is easy, fun-loving, ambitious but expensive. We are not as hard-working and fast as Mumbai is but we definitely slog harder than others.