So a few things. First off it doesnt look like you are comfortable being in on your opponent and doing combos. He is walking himself into the corner you should walk him down.
Second rewatch the situation at 30 seconds. If you could go back what would be a better choice?
#What am I doing wrong?
somber barn
vast grove
On top of what sharkfister said you need to get more comfortable moving around and taking space
The nice thing about guile is that he has pretty good normals that cover a good distance in front of him
And a good forward walk speed to chase down opponents if necessarym
So like for example you can do stuff like walk forward down back > cr.mk to poke or sobat to put out a retreating hitbox while holding down back. And you can have charge in case they try to jump you or if they do nothing you can throw out a boom