Is my dog stupid?

I don’t mean to sound mean lol. I’m wondering if my dog is dumb or like cognitively disabled though. Can dogs be born like that? I don’t a polite word for it. The R word. If you know what I mean.

I’ll let her outside in the mornings and she likes to roam the yard. It will start to get really hot but she doesn’t seek out shade. She’ll just stand in the direct sun and get herself overheated. When I offer her food or water I have to put her face in it or she won’t eat or drink. If I just put food and water in her bowls she will NEVER go to it on her own. It took her almost a year and a half to be potty trained and I was so consistent with her and used a reward system. Eventually she got it. Except she doesn’t ask to go to the bathroom. She will pace around nervously and pant. She never goes to the back door, I have to lead her there like she forgot where it was. There are some other things but I swear she’s not like other dogs. She just doesn’t seem all there. She’s well taken care of and loved, I’m just posting out of curiosity.