To me, the 'biggest' problem here is Spectre which affects all modern high-performance processors, regardless of make or model due to it being a failure of a fundamental technique used to create them.
The Meltdown bug is not more serious than Spectre, if anything, its the reverse as Meltdown has a realistic mitigation.
I see no attempt by Intel to minimise this as it quite clearly is an industry-wide problem, don't start looking for scapegoats where there is none.
There isn't always someone at fault.