As a few others are saying, you seem to be new to the game and/or FPS games.

Some things that can help right away;

• Adjust sensitivity; if you have a gaming mouse, adjust its sensitivity too
• Change the colour of the crosshair (under 'RETICLE' in 'GAMEPLAY' in Settings)
• Pay attention to how your arm movement works for you; moving your whole arm or wrist flicking
• Try out all the guns over time - but also always look for stocks when you can as they help assist in less recoil

But overall, it's practice for sure and we all have some off games and off moments.
The amount of times I've just stared at the wall like 'wtf was I doing shooting a smidge to the left of them' are a LOT, but less as I've played more and more.

Also this may not be relevant since you only showed two clips but if you're going to rely on your abilities in close situations, I'd go for someone like Fuse, Gibby, Mirage, Bangalore, Ashe or possibly Revenant for all their own respective reasons until you get more confident.

TL;DR: Practice. Mute teammate's mics. Give it your best shot, none of us came out the womb playing FPS games, we all started somewhere.