Question How do I keep my mouse inside one monitor without it accidentally slipping into the other?

[SomeGuyonTHW]

Here's what my setup looks like:
|-------------|
| 27inch |
|-------------|
|------------------[X]--------------[X]-------- -----------|
| 49inch |
|-----------------------------------------------------------|
with the 27 inch being above.
This is exactly how I set it up in Windows/nvidia control panel multiple display setup.
Look at [X] spots I have marked
However, if I try to close the window or grab windows that are fullscreen, I accidentally keep slipping into the second monitor.
This is despite the fact that the top monitor is smaller, so my mouse MUST ONLY GO TO THE TOP MONITOR IF I WANT TO ENTER SECOND MONITOR FROM THAT AREA RIGHT?
Well Nope! ANYWHERE on the top side of the 49 inch I try to grab it just keeps going into the 27 inch!!
Like for christ's sake windows cant this be like side monitors? where if your second monitor is smaller there's a smaller area where you can enter the second monitor?
Is there a way, a third party program, anything, to end my suffering and allow me to only enter second monitor with my mouse if I'm in the area between the marked [X]s?
This is honestly the expected behavior and I'm going crazy, please help🙏🙏
edit:
my apologies the text drawing I did looks bad, here's a picture:

https://imgur.com/wZ24DXx

View: https://imgur.com/wZ24DXx

 

[USAFRet]

Ignoring my #3, put yours like this.

Only path from 1 to 2 and back is at the corners.

 

[SomeGuyonTHW]

Ignoring my #3, put yours like this.

Only path from 1 to 2 and back is at the corners.

Seems like that's not the case, it might be a problem with having ultrawide?
Because I did exactly this and I can go from the 49 inch to 27 from ANYWHERE at the bottom of the 49 inch, not just the corners.

 

[SomeGuyonTHW]

I wish there was a program that made it so that you have to hit the edges of monitor with your mouse twice before leaving the current monitor, that'll save me.

 

[USAFRet]

How about side by side?

 

[SomeGuyonTHW]

How about side by side?

My brain can't handle it, it just can't