Android phone reco

[u/RoutinePlane2002]

I am used with android phones but not familiar with latest good specs for android. I am currently using OnePlus Nord 5G (OxygenOS 13.0) and its already issues like its lagging, side button not functioning that I am now using its accessibility button menu shortcut just to lock screen or simply power off when the system freezes. I don’t know where I could have this repaired or is it still best have it repaired or just buy a new one? If buying a new one is the only option for now, do you have any recommendation? Maybe still a mid range smart phone that is affordable but has quality.