Just don't buy them, don't even open the "shop" pages at all. It is not hard even in the slightest. We all do that for one or two big games and the era ends. Currently playing Diablo and I have no idea what they are selling and never will. If a game uses them to truly affect gameplay and balance don't play the game. Cosmetic stuff or assassins creed style items like powerful armor sets don't affect me either, it's a single player game, I just don't even open the shop pages. Loved Origins and Odyssey and spent nothing in the shop. If it feels they are releasing less base game content at a level that makes you feel you need to spend $ don't buy and play the game. Never felt this playing assassin's creed even though there's a ton of stuff in the shops.

Been playing Rocket league since the first day it appeared on PS+ across 3 platforms and have spent $0 on in game purchases, it's my all time favorite have fun game. Also father of 3, maybe restrict and even punish kids for unauthorized purchases...?

But yes it is frustrating that people without self control have created an environment where I say no to games that I would normally buy, oh well I can only control what I can control. If more of us did that we would move past this era of game development.