Hi there, thanks for trying out Gutenberg! Sorry to hear that you haven’t had a good experience with it so far. The team is constantly improving Gutenberg, so yes, things are always changing. It’s feedback from folks in the community that helps the team understand where to improve.
If you prefer the classic editor (especially for inserting text, as you mention), you can try using the Classic Block in Gutenberg. You can call it by using the inserter “Classic” or with the slash command “/c”. This block has the Classic toolbar and doesn’t break up your text into single blocks.
If you’d rather not use Gutenberg, you can also use the Classic Editor Plugin (which will still be available after Gutenberg is added to Core).