The "slow rising and falling" is purely due to you using a soundcard as an oscilloscope, soundcards
are AC coupled, as pointed out by cmiyc in #2.
You have no decoupling capacitors on the board, I note - perhaps the 433MHz module needs one?
In general a board without decoupling is an immediate red-flag.
In general if you have an issue moving from a breadboard to a PCB then you made a mistake in
the copying - it pays to double-check with electronics since only one mistake can render an entire
circuit inoperative (or cause damage).
"Check twice, buy once"