Lol. If you want to call adding challenge to the game to be "against players", then they might as well just remove all zombies from the game, right? After all, the zombies are against the players. You want to believe that anything that doesn't fit your own agenda is wrong and targeted against you, but it isn't. Enemies should be able to find and attack the player and reach the player whenever possible. That's the point of the game. If you don't like fighting zombies, disable them, or disable horde night. You are upset because you have to adjust your base designs to handle new challenges instead of using the same design from many years ago, but it's an evolving game since it's under development, and that means your base designs need to evolve as well. It isn't like you can't build a base to handle the changes to zombies. They didn't make it so you can't defend against the zombies just as easily as you could in the past. It just requires a different design. There is absolutely nothing wrong with that.
They removed jars because they didn't want them since other containers also disappeared. Any other reason was just a bonus for them. Yes, they didn't want players to just fill hundreds of jars in the first few days. That was additional to just wanting the jars gone, though. And I don't see any reason why you should be able to fill so many so quickly in the game anyhow. As you pointed out, people can still get plenty of water for making glue. They just can't do it in seconds, which is a good thing.
No, they don't go out of their way to ruin things for people. You can tell that by just looking at the different cheesy things you can do in this game that the devs allow to remain. However, if something is broken, or is against the design they are going for, or is an exploit, they'll change or fix it. That's what happens during development.
Early access and alpha access are clearly not something you should be doing since you seem not to be willing to accept that things change. Either wait until the game is complete, or play an older alpha, or use mods. Spending so much time being negative about things that changed years ago and will never go back hurts only you.