I don't think so. For starters, they test a lot in SpaceX. N1 had ablative engines, which could not be test-fired on Earth. They could only test them by launching the entire stack and hoping that it would go into the orbit.

The current wave of problems is likely caused by optimizations in the v2 of the rocket. Starship v1 was very conservatively built and mostly worked. They are trying to squeeze extra 25 per cent of payload capacity from v2 (from 80 to 100 tons on LEO), and they are running into the edges of multiple envelopes.

Raptor v2 BTW seems fine, the main issues are around the plumbing that feeds propellant into the engines.