Communists today are using all the same materials and asking people to read works like The State and Revolution, the Manifesto, and so on. I'm not sure what you think is so different about messaging today from the messaging in the past.
The difference is that we live in the present, not the past, and the present is a lot different than the past.
The communist manifesto was brilliant because Marx and Engels wrote it specifically for the average working class people of their time. It wouldn't have worked if they wrote it for people almost 200 years past.
Let go of the history and tradition. I'm not asking anyone to write a new communist manifesto of the 21st century, but talk to people like you live in 2023, not a cult of tradition. Embrace modernity.
but the fact that most people in the west have been generally happy to keep capitalism and ignore its problems
Lol, no. Open your eyes up, Westerners hate capitalism, they mostly just don't know yet that it's capitalism at the source of their problems. People are exhausted at the idea of the iPhone 16 Max Pro Plus X Series, they just want to make a fair living wage to provide for their family, and have time to spend with their family. If you can offer a home, healthy food, medical care, and education at 32 work hours per week, you are sold to almost everyone in the US.
The US has never been a country that's good or fair. It's only very slowly gotten a little better through the sweat and blood of good people.
If we want it to get better it's going to be a lot of difficult and painstaking work.