Same and similar issues here.  Had inginual hernia repair surgery.  Problems ever since.  Low ejaculate.  Semen/ejaculate is so runny it will act and drip like water.  Had inginual hernia on left side and left testicle will tighten during ejaculation.  The tightness is not normal condition/sensation before the hernia repair.  Semen doesn't appear mixed properly and have to squeeze most of it out.