ts mainly due to the lack of base block larger than 1 MB size.
there is no lack of transactions for sure this time 
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But due to so called off by error,segwit2x blocks started rejecting smaller blocks at block 494,783 instead of 494,784 where hard fork was expected to occur.Even another btc bug1 also prevented miners from mining bigger block.That's the reason for falure of another attempt.
what is this error you are talking about? there is no hashrate to mine a block! or in other words none of the miners are mining bigger blocks on SegWit2x so far that is why there has not been any new blocks there, i am not aware of any bugs. please explain if i am missing something.
Yes you are missing something. Simply google it.