We have used F2FS in thousands of devices and have seen a large reduction in flash memory failures compared to EXT4/XFS etc. F2FS is designed for NAND flash devices with a flash translation layer, such as EMMC, MMC (SD card) etc and works better with the wear leveling algorithms to extend the life of the flash memory. F2FS also has better performance than EXT4.
Samsung originally developed F2FS. I don’t know why you say it is ‘fake’? F2FS is used by Google, Motorola, Huawei, ZTE etc. Google is a significant contributor to F2FS development (check the commit history).