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Hoping to get some advice on my tire/wheel situation.

I purchased a used 2009 335i Convertible w Sport Package 4 months ago from a used-car dealer.

The tires on the car are Run-Flat Bridgestone Potenzas
Front: 225 35 R 19 - 88Y
Rear: 255 30 R 19 - 91Y

My Rear (passenger side) tire popped in the first month. The dealer covered the cost and put on a new Pirelli tire (same specs)

2 months later, the rear-drivers side popped.

Both times the tire "popped" I was starting a right turn, with barely any speed, and BANG, sounded like a gun shot.

I live in LA and yes there are tons of pot holes, but I am cautious and do not drive aggressively enough to warrant popping 2 tires in 3.5 months. I'm looking for advice on the best route to take to ensure I'm not buying tires every other month.

Option 1. buy 1 run flat needed, get tire installed and full alignment
(someone suggested an alignment issue could be the source.)

Option 2. Replace all 4 tires with Non-Run Flats.

If I go with Option #2, do I keep the 19s? or should I consider 18' wheels + tires
- Is there any benefit to replacing the 19s with 18s in terms of wear + tear and performance? Initially I thought the 19s might have been the source of the problem - that's the only reason I considered the 18s.

Photo of inside door panel attached for reference.

Thank you!

[E93Beast]

Replace with non run flats and good to go.
I have had zero issues. Just get good quality tires.