Sadly, yes, that bus service directly to the Boardwalk from CSR has been discontinued for some time. Best/quickest way is by taxi, but that cost a few dollars($7 without tip). Otherwise take a bus to DHS and the boat to the Boardwalk.
@Buzz2001 is correct, but I will reinforce his recommendation of a Taxi. A taxi will get you there in minutes. The bus plus boat will be nearly an hour each way.