Do film folk knowingly release badly made movies?

I just walked out of Death at a Funeral and while I wasn’t expecting it to be Truffaut or Bunuel, I was expecting some pacing and broad humor. The acting was appalling, the sound was lousy and the pace felt like it had been filmed in slow motion underwater. I’m not looking to discuss pros and cons of this movie or even of different genres. I just wonder why if it seems so clear to me that this movie and many others are badly made, the directors and actors don’t realize it. Is there so much money involved by that time that they can’t fix it? Or is it all a matter of personal taste?