I want a better run then my current pb and what should I improve and focus on?

I took notes as I was verifying your run.

Map 1 - Try to back up and go through the exit door as you did with the others.

Map 2 - Red key room can be a bit faster. Exit door open from the right side of it so the zombies (or at least 1) don't/doesn't see you, then you'll be able to strafe straight to the switch (see top runs for this)

Map 3 - Shoot the barrel when going through the second door. It gives you a small little speed boost if timed correctly, but more importantly it takes out the two zombies (sometimes the 3rd if unlucky) so they won't be in your way on the way back.

Don't bother with killing any enemies after the barrel bit, you are just wasting time doing that. Strafe past them. But kill the shotgunner in the hallway like you did. He's an asshole. Also try to watch top runs to see how they execute that bit, it will help you alot. Takes practice with the movement.

Map 4 - Movement a little erratic, but overall good job.

Map 5 - Strafe run more often. Overall good.

Map 6 - Stay out of that zombies site as often as you can. Every time he fires, that's close to a second gone. This map sucks. It's one of those maps where you can either be really good at it, or it fuck you over in more ways than one.

Map 7 - Rocket the pinky at the start. Try to have your rocket launcher out by the end of map 6 if you can. Rocket the pinky by the red key as well so you don't have to deal with it.

Map 8 - No glide?! ROOKIE. Lol jk overall good though try to have health as low as possible (easier said than done sometimes)

Overall very good run. Work on your movement, and try to avoid walls. Aside from all this, that is your next biggest time loss. Takes time and practice. Keep at it! You are doing great!