Incoming tough love:
"The scheduling is really opaque, there are all these BS assignments scattered in throughout the rotation"
Welcome to medicine. The amount of BS you deal with as a resident and attending isn't going to get better.
"I feel like I have to run around trying to find whatever resident is randomly assigned to me and hope they aren't annoyed or bothered by me"
Yup, this part is annoying. Hopefully you'll get good residents who are actually interested in teaching and are not too overwhelmed to do so.
Things that you can do to make their life easier:
i) be proactive - keep an eye out for 'scut' tasks that are handed to them during rounds and volunteering to help out here and there (e.g with getting records, calling PCP, circling back to get additional history, etc),
ii) don't waste their time - before asking a question, at least try to have looked up the answer online. Nothing screams laziness like asking a question that can be answered with Google in 5 seconds. Similarly, ask questions that are actually pertinent to a patient's care, and not something obscure.
iii) be positive and don't complain - residency can be dreadful enough as it is, and having someone on the team be excited and positive can make all the difference. Even if you are not interested in their specialty, recognize that they can still teach you something that will be helpful in your future practice.
"I'm absolute ass at doing SOAP notes and presenting"
And that's why you're there to learn. Regardless of which field you're interested in, you will need to learn how to succinctly communicate the relevant findings to other teams. And yes, this is even true in specialties like radiology and pathology.
"the hours are brutal"
They don't get better during residency or fellowship. It will get worse before it gets better.
"I just am not interested in this clerkship at all"
See my point above. Even if you're not interested in the subject matter, there is still much that you can learn from every service. I'm in internal medicine and I know that most students rotating through are not interested in my specialty, despite everyone professing 'yeah, I'm either going to do medicine or X' or 'I'm still undecided, but medicine seems cool'. Regardless of their interests, everyone can and should still learn how to manage hypertension, and diabetes, how to interview and present efficiently, communicate with outpatient teams, hold family meetings, etc. Similarly, when I was a medical student, I learned from surgery when they should actually be involved in a patient's care. From pediatrics, I learned how to deal with difficult family members and to get information from patients who cannot tell you what's going on. From radiology and other medical subspecialty services, I saw the importance of asking thoughtful questions so that they can best help the primary team figure out what's going on, etc.
You don't need to like the specialty or clerkship, but you should still go in with a positive attitude and look for things that will help you in your future career. You are paying a boatload of money for this experience, so take advantage of it.
3rd/4th year is the last chance we have to learn with essentially zero responsibility. That is a gift in medicine.
This. Residents would kill for the opportunity to have no responsibilities or expectations for a day.