So when I tried google's Deep Research in Gemini, I ran into the same problem. It was basically a typical llm chat response, but a lot more verbose and citations to the same blogspam listicles that makes regular human research difficult.
How do I avoid this pitfall? So what I am asking is, how do I use deep research?
So if you want to do "real deep research" into some topic, then you start with the various summaries and drill down. I use Google Scholar to locate papers, then I search for the cited papers. It is tedious, but the only way that I know which avoids the pitfalls of random regurgitation of easily found materials.
Currently AGI is marketing hype. Critical thinking with real understanding, i.e. knowledge building hasn't yet been automated. You need to put in the intellectual effort.
It generally helps if you ask it to focus on specific kinds sources (gov sites, academic, etc.) but it really depends on the topic. Easy for some topics (the general sciences) but not so easy for other ones (popular culture stuff or current events).
Then in a couple months go out of business when someone tricks the AI to spill its prompt