I'm trying to start a business and want to get feedback from the general public in the following areas:

1. The idea - what does the general public think about the business idea/model itself? I do plan on getting feedback about the product from users within the domain separately
2. The ad design - I've been running ads for ~$5 / day for a little now. I want to have some help in analyzing the marketing data to understand if my ad is good or not. Also, what does a good ad even look like/consist of?
3. My landing page - I want to receive feedback on my landing page for the product

Looking for any subreddits where I can post about any of the above. My business is surrounding the game league of legends, so if anyone knows of league subreddits that aren't hostile to people in my situation I would like to visit those too!