$8.7B in losses over the last 5 quarters sounds bad, but that is also with $20.4B capital expenditure in the period and double digit percent increases per quarter in user metrics.

By traditional business metrics it looks toxic but compared to a typical tech unicorn it's not really outstanding.

Considering it's a tech unicorn with strategic and financial leverage like no other (their own global Internet infrastructure, access to arbitrary billions in capital, ability to build the biggest chip fab in the world), it's certainly fair to call it a gamble, but to call it failing is a stretch imo.