Can anyone recommend a simple and noob/nonprofessional-friendly cross-platform app for simple graphic design and photography uses?

I normally recommend GIMP for this but for some people who I help with their projects it’s overkill and not worth learning for infrequent use.

What can I recommend/teach such people to use, which is more stripped back?

Common use cases are putting together basic flyers & ads, restaurant menus, cropping photos etc.