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No experience from my side, but LTT just released a video on degoogling with 4 recommendations to replace Google Photos: https://www.youtube.com/watch?v=YnSv8ylLfPw&t=681
Usually their videos are superficial at best, but this one I actually liked.
Other than that you might what to look into Nextcloud. And yes Apple is doing a great job with how integrated their apps and systems are, but the privacy implications are just horrendous. It's so invasive that it's very hard to even replicate yourself... And they just happened to be in the news for never actually deleting your old photos (e.g. nudes).
Let's hope you find a better solution that is privacy respecting and controllable (and actually does delete files when told to do so). I'm interested in the recommendations.