Don't talk about things you do not understand.
I couldn't agree more, good sir. Your plan is uhh, well, "flawed" to say the least.
First of all, have you made any adjustments to the microwave oven you used? Because most, if not all, have a safety mechanism that prevents it from operating with the door open. Secondly, the electromagnetic forces/field generated by a microwave oven, stay INSIDE the machine. Whether you leave the door closed, open, or slighty ajar. It's not like you start "leaking" microwaves.... you can forget about anything, let alone particle acceleration, taking place....
And for the monitor, injecting electrons? A cathode ray tube (crt), in the case of a monitor, simply lights up phosphor. And needs a thick heavy lead glass cover to operate because it requires a vacume. Guess what else the glass does: cointain the x rays and other byproducts. Don't count on any electrons ever leaving the device, except for the cable which powers it.
In real life, both devices will have zero effect on eachother or anything else. Unless you want to heat some ramen and watch tv.
Please explain your "building plan" a bit more, because it sounds like a lot of fantasy and zero actual knowledge.
And also, with the billions of homes, which are filled with millions of monitors and microwaves, thousands and thousands are bound to be vertically alligned by chance, right? So how come half the earth's population hasn't dissapeared into thin air yet?