Thank you for contacting us.
I am sorry to hear that the Post and Page builder does not function as expected and our team will do everything we can to answer your questions.
Each paragraph created in the Visual Editor is automatically wrapped in a set of HTML <p> tags which makes it easy to rearrange individual pieces of content or adjust the spacing between them. However, I can understand how this can be frustrating when you want a single, large block of text to behave like a unified object.
One thing that you can try is holding down the SHIFT button when pressing the ENTER key to create a new line. Starting new lines this way creates a newline character inside of the <p> tags that are wrapped around your text content. This allows you to have multiple paragraphs within a single <p> HTML element.
I hope that this information helps you create the design you are looking for and please let us know if you have any additional questions!