The whole network has enabled SegWit.

SegWit is a lie.
It's not a block size solution - core knew that - but they lied about it to get their agenda.
SegWit is, as it's name specifically states - a bug fix for their fuck up of P2SH - segregating the witness data from the transaction hash data to avoid a malleability issue that in truth is not really a big deal at all, only a problem for sites that can't code their transaction processing in a safe manner.
That's the reason it exists.
There are other side effects, but that's the name of the change and the reason it exists.

Why do you think 2x never happened? Coz core decided that their central control shouldn't allow it.
2x is a block size solution - double the block size.
Not the BEST block size solution, but better than the SegWit scam.
The current problems WOULD NOT EXIST if the network was using twice the block size.

IMO the best block size solution was BIP100 - but that was never going to be implemented because the size was controlled by voting with mining power - not controlled by core - so they would never accept that option - they want to keep their central control of bitcoin.

Part of SegWit increased the cost of transactions with addresses that start with a '1'
Now one of the reason why transactions are still slow under segwit is that you have to transfer ALL your bitcoin to P2SH addresses ('3' addresses) to get the pre-segwit cost of transactions.
All addresses that start with '1' now cost 4 times as much to process with corecoin bitcoind.