Socialism

I am trying to understand as much as possible about socialism as well as other leftist ideologies, and looking around i’ve seen many being critical about democratic socialism, but i honestly struggle to understand why that is such a bad idea as some say. I get that it’s incompatible with ML, but it doesn’t sound so unrealistic and unreasonable to me, so… can you explain? Excuse the ignorance, but as i said socialism is a new topic for me, i mean no offense to anybody