Aight my man, this is going to hurt so brace yourself :
-Sound is atrocious (lots of noise)
-I can't understand a word you say (can't hear you + mic noise)
-I don't want to hear you cough, this should be edited out with no questions
-No editing at all, I don't need to see loading screen, silent moments or hear you read the instructions where you could try to make some edits to make everything interesting.
Start over and work on the basics first :
-AUDIO = Very important. Your mic doesn't need to be perfect, but this is a huge turn off for people if it's not great. I would suggest to look for tutorials on youtube on how to get a proper sound recorded AND/OR tutorials on how to clean the sound with an audio software.
-EDITING = People don't like silent moments, especially in gaming (excluding jokes or stylish purposes). Silent moments, Coughing, moments that are not interesting or fun should either be reworked with editing to make them funny/fun or removed. You should only keep moments that are special and have value.
-If you are new to editing, try to mimic videos you like (to exercise yourself) . Don't copy paste, just try to make something similar to get used to your editing software and editing in general even if you don't plan on uploading the video. And slowly your style will show up.
The thumbnail is AI, a big turn off for me as well. I don't mind AI being used slightly but when everything is made of AI you can tell.