It is definitely not OK. Time Warner is absolute garbage and has been for a very long time. Cablevision has an excellent network.
I know this very well.
Unfortunately, some towns contracted with Time Warner and some with Cablevision and you can't pick who you want as your provider ... unless you decide on where you live based on the available ISP.
As much as I love a good connection, I will not make my decision on where to live based on the available internet provider. Reputation is worthless unless people have a choice.