I've been through the bad instructor thing in undergrad and had to take a lesser degree after a fracus with two bad profs, one of which was "sleeping around" . In my case the VP for academics at that university told me he was the golf buddy of the Prof involved , knew the guy well,, didn't believe me,, and was was going to do diddly squat.. You can bet on the fact that the incompetent miscrient was told about my "confidential and anonymous" interview by the seventh hole of the next round of Golf.
When I got out into industry, the Prof in question was known to be a perpetual screwup and switched to teaching because his wife had the connections to get him a job. My bad review and horrible experience during the co-op was ignored.
I work for a competing institution now, and my leadership would consider those same actions intolerable.
Normally, if this was not Covid time, I'd tell you to seek legal counsel and or the school's ombudsman/ leadership and protect yourself. Especially if you have to take a certication exam from an independent agency down the road.
Ignore the cheater, in industry he'll be down the tubes so fast you'll see flames from the aerodynamic heating as he is tossed out of the building.
Instruction during this emergency period of time has gotten sloppy. The fact that the cheating is tolerated is because the Instructor is likely rated on student passage, not overall student performance.
Not the way it should be, as most modern schools do the full tracking and stats. But likely the way it is. If he/she did that where I work he/she would be fearing for the future of their career, the stats kept for institutional certification would catch it. Not all institutions have such wonderful, just,, and moral systems as where I work.
So here is what you do :
Make the most of it and learn on your own. You will know the subject cold. The Instructior may be tenured, in which case student complaints drop off like raindrops unless there is a known pattern of bad behavior. My bet is you can find wonderful videos on YouTube. It's late in your academic career, there is a world crisis,, your not studying medicine or aviation, so get the paper and get out.
Know that you are a good honest student, and most Instructors love students with motivation and integrity. I know I do, and I'm just the support technician.
If the motor topic comes up in an interview. Simply say my Instructor was very weak in that area, leave off the sordid details, and say "I'm willing and eager to learn whatever you can teach me as an employer. Tell me what to do to learn boss. And I'll go study".
Why am I saying this when normally I'd say something to my leadership if I had the slightest wiff of any cheating? I got really burned by a rigged system at a bad College. The institution's culture determines what happens. Frying/reprimanding an instructor off a single complaint is unlikely to happen during Covid rules. I can tell you that cheating is happening like crazy world wide. I can also tell uou that many instructors are unable and untrained to cope with virtual learning situations.
Virtual learning will be over soon, and right now its the excuse for a lot of sloppyness. During a normal semester you'd have a strong complaint. Right Now... Your mileage may vary.
If you don't have a board to set in the future, and do not face a Cert exam, let this one fly. Avoid this Instructor in the future.
If the whole small group was complaining, you would have grounds as a group to act. But right now, at many places, Instruction is on a "What Can be done reasonably " Basis.
If the school had the active moral code: "I will NOT Lie, Cheat or Steal, Nor Tolerate Those Who Do", you'd be in a strong position. From what you have written, that does not seem to be the case.
ARE YOU FACING A CERT EXAM? If not, live with it and know you have far more integrity then those involved. Interpersonal actions during COVID are strained.
Know that you are right to not tolerate cheating. However that duty to enforce falls on the instructor. If the instructor is aware, then you have no further duty to enforce, there may be some circumstance where a weak student or student coping with outside circumstances may be "open book" with Instructor's tacit approval.
I have an Ed degree for Secondary Education. I work in Engineering Education because my moral code would not allow me to release the "social promotion" students out in the world without knowing how to read and write. I spent my required field experiences in inner city schools and in one poor performance rural district.
Humans are sloppy. It's sad, but not all students have the capacity or desire to perform well. Due to human factors many educational systems let the morally intolerable fly. Sounds like your in one of those situations of "Social Promotion". In which case get the paper and bail.
Steve