The biggest problem with Xiaomi's original ROMs is the crazy amount of ads. And they don't even offer a subscription-based business model to avoid them. The hardware is good these days, but the software is not.
My Redmi Note 13 Pro Plus is nowhere near as good as my last Xiaomi - the ads seem to have increased, and the battery life has gone to shit after <1 year of usage. I won't get another.
I had an Xiaomi 14 for a little bit with the EEA ROM and had zero ads.