That is certainly correct. Boeing has failed to accept culpability in any meaningful way, and insists there never was a major problem. Denial, regardless of the facts, probably is not an optimal response in a situation in which the outcome depends on good will from the party that grounded the aircraft. Upsetting the NTSB is not the same thing at all, since the NTSB has no regulatory function.
Boeing, by intransigence, has given a
PR festival to anti-Boeing forces. I wish they were better at such issues. Is has not helped their case that they have announced layoffs more than once since the grounding, insisting they're unrelated.
My opinion of Boeing has become negative since these events, less for the events themselves than for their actions since the grounding.