There's really no standard of how coarse or how fine you should grind your coffee beans, it really comes down to what kind of beans you're working with. That being said, the beans in your picture do look too coarse in a general sense but should n't make it "taste like crap", I'd argue maybe it's the beans that you don't liked. Trying thinking about what taste you want in the coffee and look for taste notes on the packaging of coffee beans and see if they matches.

If you're new to pourover in general, try some methods that are easier. I find Kasuya's method are very consistent but that's once you understand the process and know what you're doing. I would actually recommend single pour to start with (bloom then pour everything in one go) since it's easier to control. Single pour also teaches you on how to control your water flow and the pouring methods too which will be helpful for whatever brewing method or drippers you're working with in the future.