If you’re only problem with your current phone is the battery, maybe look into replacing the battery.
Either DIY or bring it to a reputable repair shop.
I just replaced the battery of my OnePlus 7 Pro (and a backup OnePlus 7 Pro also) myself. Was a lot easier than I thought and now the battery life is great again.
The SD865 in it is more than capable to tackle anything I do (no heavy gaming or other resource heavy tasks) so instead of spending $800+ on a new phone I spent $25 on a battery.
I’m also running a custom ROM (crDroid) so I don’t have FOMO on the latest software.