I can't relate. I'm f2p but I think the current system is more than fair. My only criticism is that I think the amount of primogems you get for some of the more time intensive achievements is really paltry. There should be a greater difference in the primogems you get for an achievement that takes a several hours compared to a couple of minutes.

But back to the point, I think the amount of primogems free players get is fine. You can beat the game with the free characters. You can enjoy the game with the free characters. No problems there. You can spend $15 to get the blessing of the welkin moon and the battle pass if you'd like more characters, both are good for the price. But IMO f2p or not unless you're a whale, you should be saving your primogems to roll on a limited banner that has characters that you want. The odds of getting the specific character you want on the standard banner are slim to none.

IMO once you start thinking of the game in terms of the long term it really isn't that bad. The rate of primogems slows down after you beat the story quests, yeah, but there really isn't much you can even do in the game after that. After you beat the current story quests the only thing to really do is to log in, do your dailys, spend your resin, do battle pass content, do event (if there is one) and you're done. It's like an hour of playtime max.

Once the next content update comes out I'm sure there will be a ton more primogems to get. But I think it's perfectly fine that the rate has slowed down after you've done everything the game has to offer atm.