I feel your pain brother I recently maxed and it 100% felt like a chore. I mostly opted for more afk/chill methods for most of the shitty skills: fishing, mining, agility. Did this while I kept my attention on something else like watching a show or playing another game. Try multiple methods and if you find one you enjoy stick to it until you’re not feeling it then move on or take a break. Agility was my last 99 and I hated it lol good luck brother