The Minecraft Launcher works without any problems, but when I get into the game it gets fully bugged. The individual buttons in the game (e.g. single player, options) are only displayed halfway. If you enter a world, this is completely bugged and it doesn't look like normal Minecraft, even though I bought it from MInecraft.net.

A long time ago Minecraft was played on this laptop, but with a different account. You could play normally with this account.

The problems started after buying a new Minecraft account.