@gone Hello from Kbin! To my understanding, changing OS to something like #GrapheneOS is probably better and more secure than just removing all the bloat from the system, since you can't actually delete to a 100% all the proprietary components from #Google and your manufacture without breaking your phone, as far as I know, graphene has features that no other ROM nor #AOSP have which are better for privacy, and treats all the apps as equal for better security.
TheHatedOne (youtube) has a series of videos about grapheneOS that may have the answer you want.
But in my opinion, deleting all the #bloat with adb is better than nothing, so, you are good to go, more if you can't afford to buy a pixel, #android has a good sandbox for apps AFAIK.
After all, I recommend you to use a firewall like NetGuard to block everything by default and just allowing a few apps of your choice, or TrackerControl to again, block everything, but to block trackers from apps you allowed to connect to the internet.