DocuGen is a good plug and play option, though they recently stopped supporting Google Docs for some reason. To their credit, they have excellent customer service, and if you’re okay with using Word instead, it could be a good option.
I struggled with Zapier for a while, and was pretty disappointed. Integromat on the other hand has been amazing! There’s a bit of a learning curve, but once you get the hang of it, you can make it do almost anything.
There’s a really easy Google Docs module that can generate docs from templates, filling in variables with content from Monday. I suggest using “Webhooks” as your trigger, which will shoot your item ID to Integromat, then use a Monday module to get the item, then use that Google Docs module to create a new doc mapping whatever content you want from Monday.
Hope this helps