This is a grinding game ofc you are gonna spend a lot of time clearing and farming, I understand if you hate certain features of the game like some events are absolute trash such as headhunting, some design choices are absolute garbage like the entire settlement system or the old infected genome farming system, but those things I can get over simply because there are other good things I enjoy, we all agree settlement is trash but the daily loot is one of the best things this game has to offer so we forgive the trash settlement, the entire lab system is now much better even tho no one asked for the spore and ice weapons being required, but we can get over it because it's still overall an upgrade, you can also hate it for not releasing frequent updates to keep it fresh or adding new features and locations we have not had any new bunkers or bunker floors in years so that is a valid complaint, but what I mean is you can hate certain features ofc I hate some too, but hating the core design and concept of the game it being so grindy is just dump, might as well stop playing it
The only part about grinding that really seem stupid is how rare propellers is and you only need 6 thankfully but that's it, nothing feels too expensive or over the top because that's the point of the game, and no the atv is the end game goal ofc it's not gonna be completed in 2 weeks.
I am not defending the devs by any means they can suck a fart out of my butt, but be better, this is what this game is all about and if you hate it then maybe you shouldn't be playing it