There is no way to change the Facebook account that is linked to your game.
No. Hay Day only allows one account per device.
You can reset your Hayday account by going to the “Settings” tab and clicking on “Reset Account”. You will then be prompted to enter your email address and password, and then you will be redirected to a new page where you can set up a new password for your account.
The game may be blocked by your firewall. You can try changing the settings on your firewall to allow for Facebook games, or you can contact your internet service provider for more information.
To switch between accounts on the Facebook app, tap your profile picture in the top right corner of the screen. You’ll then be taken to a list of all your Facebook profiles, and you can select which one you want to use.
To delete your Hay Day farm, go to the Settings menu in the game. Then, tap on Delete Farm. Tap on Yes to confirm deletion.
You can’t make another Hay Day account.
To delete your Supercell ID on Hay Day, go to the app and tap on “Profile” in the upper right corner. Then tap on “Edit Profile” and uncheck the box for “Show my Supercell ID.
It is unclear what the intent of this question is.
The Facebook games you’re playing are probably just not as good as the ones you’re used to, and you’re struggling with them. You can try deleting them and picking new ones, but they might not be any better than the first set of games.