Hello. First off, I'm sorry about your data loss. Your point is well-taken in that a reliable and quality customer service is invaluable to a company. Particularly for a company like Apple, whose products integrate their own proprietary, integrated hardware and software solutions. This point is more of an aside (and I realize quite wordy) rather than related directly to the central theme of your message, however some important points I believe, nonetheless. I'm not familiar with your level of expertise, and thus I don't mean for any of this to come off in the wrong way. My first question is, if you had valuable files such as these, did you have a backup (or two backups?) I would also recommend a cloud-based backup solution in addition to a personal storage device for future, because cloud-based storage probably has its own backup and is enterprise-level hardware with great reliability. In addition, given the value of your data, it is probably worth looking into hiring a data recovery expert. Samsung is reputed to be a reliable producer of solid state drives, and a brand new solid state drive should be a very reliable data storage solution. I'd love to hear more details about how the data became corrupt.
With regard to the phones, I (like you) have been on a Samsung phone for probably the last 10-ish years. I (fortunately) have not had to deal with customer service. However, a phone switch will come down to software. Android vs. iOS. Both phones are very capable and quality hardware. In general, Apple software is well regarded for its ease of use and stability, as it's based on Unix (as is Linux, and Android for that matter). So the question becomes, what programs are you currently using on Android and how easy will you be able to migrate over. In general, I have not had a lot of experience with Apple products, but I have come to realize that their software platforms play well together (mac to iphone to ipad etc) but are not particularly reliable when it comes to switching between systems. I'm talking about "Move to iOS" and "Bootcamp". Now, I can understand with Bootcamp, because it is a program designed to create a dual-boot setup on a Mac, ie, adding an additional operating system that can be used on the same computer. I can understand that the Apple ecosystem is predicated on using their software platform and they're not particularly invested in accommodating others. However, you'd think that they'd like to capture more market share with a quality program that transfers data completely and reliably from Android, but that does not seem to be the case. Go to the Google Play Store and check the reviews for "Move to iOS". That is my current dilemma, as I'm looking to try out an iPhone, yet, I've tried Move to iOS twice and it failed both times. It fails if you sneeze or look at it the wrong way.