Only accept hate and constructive criticism? Hate and constructive criticism it is then...
First off you spelled “criticism” wrong :P
The first image you used of the outside is with no black out lines and better quality than the next shot you used of the same shot, sure it's a different time of day but sticking to one style will make it more appealing.
The guy in blue looks backwards in the shot where he looks forwards.
In the same shot before he specks he doesn't have a mouth at all.
Please look up "The rules of thirds" as it makes this hard to watch otherwise; like the shot where he’s going down the hall way, there needs to be something on the right; not just a blank wall. Maybe some warnings about what will happen or something in picture form.
When he gets in the room with the writing he could have wiped his forehead in relief or just sounded happy instead of being like he already saw it before.
Did the program that you made this in not have layers? Why can't you see any glowing from the writing that he's standing in front of?
The tear drop takes longer to fall when it's not connected to his face so I guess gravity is different where he is?
Also I hate the text boxes! Like are you trying to hide them by putting them up there? You could have narrated them instead and it could have come out way better.
Lastly; you say your "Not an animator" What!? This is Very good for someone who’s not an animator and with some little things here and there; you could easily make this a lot better.
If you wanted I could give you like three or four things that you did right, just PM me if so or if you want any other advice let me know.
Hope this helps.