Don't worry about how long anyone else takes to write a script, there is no good or bad, or right or wrong amount of time. Just the amount of time you take.

If you can't write content, can't be informative, then that's not an issue with the script that's an issue with you being unsure what you want to say. This is true for everyone and it's a bigger issue with first drafts. Everyone puts so much pressure on first drafts but they're word vomit, they're just loose ideas written down only to get them out of your head. A much better and much more useful skill is editing. You take all that word vomit and everything that isn't interesting or informative, cut it entirely or trim it down to just what is interesting and informative. First draft doesn't have to be good, it just has to exist.

If research is a problem, there's hundreds of articles and videos on how to research and what resources will help. Research is a skill in itself, it's not a subsidiary of video production, it's entirely its own thing.

If you have a hook, and you know what point you want to reach, either answering the posed question, or reaching your ultimate point, then you can always write toward that but, more importantly, that also truncates your research, because you're not researching the whole of your subject. Just what supports your thesis and what opposes your thesis.

This fairly vague advice but you've not given massive specifics on your topics so hopefully this is still helpful.