I can’t think of much to add.
Dragging a decent mtb through seven sorts of rubbish on a regular basis will mean stuff breaks. I too have a 2015 Camber Evo. This has been generally reliable in my view but has very few original items, my forks are currently in need of replacement, dropper post is still working, cranks and brakes are original.
I am on probably 3rd or 4th drive train, 3rd set of frame bearings, 4th bottom bracket, second set of wheels, you get the picture.
The bike has not had an easy life, BC Bike Race, various xc and marathon events, a host of trail centres, 12 months of neglect in Ireland, trips to Madeira and Italy for uplift riding……. more than 4,500 miles of not easy off road riding.
The bike is great and still puts a smile on my face. Keeping it all running smoothly and efficiently costs time and money.
And to answer the question – have a look at getting a Turner and using the grease ports regularly to keep all the bushings running smoothly through the grot. You will however have the same issues with every other component. Try for Hope of King components (hubs, bottom brackets and headset), SLX running gear and Hope Brakes. Oh and no dropper. Then learn how to maintain and lube your suspension forks and do it.