Unfortunately you are right. Democrats might use the pretense of their supposed concern for working people to advance their decadent agenda same way as Republicans pretend to care for moral issues to advance corporate interests.
The third party is not viable in the majority system (as opposed to proportional) of voting. Only thing left is to use lobbying and pressure on whomever is in the office. This is not much.
Change "might" to "WILL" and you've got a bullseye.
Ironically, that decadent agenda runs exactly counter to the working class that voted the perpe-traitors into power.