There are many types of democracy. Representative, direct, parlimentary, and so forth. Even as liberal democracies, these were erected in revolutions led by the bourgeoisie alongside the Proletariat against the Aristocracy, and as such serve the Bourgeosie and suppress the Proletariat. You haven't indicated which of these you support, or why they are better.
As for your disagreements with Marxism, by your own admission you have only read the Manifesto, which is an inflammatory pamphlet for workers. Under what pretense could you hope to discuss something you haven't investigated? What is there for us to discuss if we have one person who understands Marxist theory, and someone who rejects it without having read it?
I absolutely agree with you in saying that you do not need to have read theory to have opinions. What I have been trying to say is that you need to read theory to have opinions on said theory. You are rejecting Marxism without knowledge of it, which makes discussion difficult and incomplete, especially because you have been against my clarifications on the topic.