The biggest potential problem you have here isn't related to the yard at all (which is otherwise ok. See BigGRacings photos up above.
The biggest problem you have with this plan is the double reverse curve at your lower right corner, due to proximity of the double crossover turnout/switch to the curve at the right end.
Easily solved. Move the double crossover further left, so that the third curve is not a complication.
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"What the he** is he talking about?" might be your question about right about now, so let me clear it up (I hope!).
Circling around the right end (clockwise running)...and on the INNER track...you face (assuming the double crossover is set to the converging route, aka left), you are completing a right turn (coming off the big curve), then are suddenly going the other way, to the left...and then back to the right, moving to the outer loop.
Walk this through carefully if it's not immediately clear, as the "crossover" is pretty much taken for granted to work reliably...and it will.
But a crossover is still a reverse curve. First one way, then the other.
Combine that with another (or third) reverse curve as you have done here is begging for problems. But, as I said, pretty easily solved.
"What third curve is this?" Walk it through slowly. You are turning to the right running the inner loop clockwise...then suddenly turning left as you enter the crossover when it's diverging...and then right again as the crossover moves back to the right.
Three curves.
ANY crossover, even something as simple as a switch at the end of a passing siding, is a reverse curve. A double curve. The track moves one way, then the other. This works because there is usually a straight (tangent) track in between the reverse curves.
Double curves...reverse curves on this scale are normal. But when you add the third curve...meh. That's when things start to..............."go off the rails."