Beyond frustrated with worst computer ever

Question

I think I may have the most unlock/worst macbook pro ever created. Hang with me here.
Background: Back in February my computer started becoming unresponsive and i went to the Apple store and turns out i had a dent in the side of my computer, an impact that likely busted the hard drive. Got that fixed and my computer ran great.....until about three weeks ago. Same thing started to happen again (stuff stopped working, lots of pinwheels, computer becoming completely unresponsive), I take it in again and lo and behold, there is another dent in the side of the computer, damaging the hard drive.....again. My computer barely leaves my desk other than to take it to class in a protective case, so this is perplexing to me, but i get it fixed anyways.
Everything is all good for a day or two and it starts happening again. Great. The pinwheel shows up constantly, pages stop loading and crash almost every page...forcing me to manually power down the computer almost every time with the power button. Computer isn't even usable at this point. I go in to the apple store....again....and they tell me the last repair missed the real problem: the cable attaching to the hard drive. They fix this for free and i'm excited because this should be my ticket to a workable computer! Two days later....same problems again. Computer functions briefly well, then just completely freezes up, pages start crashing, and buttons (wifi, battery, finder arrow keys) start vanishing. I call Apple this time, on the phone, and they tell me what the 'REAL' problem is! When they went to fix the hard drive, they copied a portion of my hard drive onto it to save some of my info, and that portion was likely corrupted and so THAT is the problem! I deleted my hard drive info with the help of the Apple guy and reinstalled the OS software, in essence a brand-new computer and OS system.....with a week old hard drive.
Everything was going great, computer was running faster than ever for a few days and occasionally a page would crash or computer would become unresponsive every ten or so hours, nothing like before, so I thought 'this is normal, my computer is finally okay. Last night, the same problems from before came back. The pinwheel progressively appeared more, pages started crashing almost every load, it took 10-15 min for my computer to start up and for the apps to show up, buttons (their text) on the top right of the screen and on finder are completely gone...again, the app store doesn't load and just produces a grey screen, etc, etc. My computer is fast for about half an hour, then just becomes completely unresponsive again and I have to manually power it down.
Chrome also loses all my log-ins every time the computer gets turned off, despite my settings being set to 'remember me' and in the past never having this problem.
tl;dr my computer has been 'repaired' three separate times in the last two weeks with three different solutions and is still at times completely unusable, crashing, buttons vanishing, etc. Worst computer ever. What is the issue?

Answer 1

When you have the problem, note the exact time: hour, minute, second.  
These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
The title of the Console window should be All Messages. If it isn't, select
          SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar at the top of the screen.
Each message in the log begins with the date and time when it was entered. Scroll back to the time you noted above.
Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first.
Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Some private information, such as your name, may appear in the log. Anonymize before posting.