This is not the time to decry either your last job, the people you worked with or the employer concerned. A candidate who appears to have difficulty in getting on with people will definitely not be offered a new position. Nobody wants to risk employing a troublemaker. You will need to provide positive reasons for moving on from your last job, either involving different work or preferably taking up a new opportunity – to study, do voluntary work, or whatever you say you have been doing since you stopped work. If there were major problems in your last (or present) job that you wish to mention, you should only talk about possible improvements which could be made in order to sound upbeat.
If you had a terrible time in your last job and feel that nothing good happened to you there, try looking back at the experience now. With hindsight you may be able to describe some learning points for you personally, aspects of your time there that did teach you about the world of work in a positive manner, or motivating factors to leave that could seem useful to the interviewer. For instance: you felt that you wanted a role with more responsibility, greater challenges or more scope to be creative. This will help you to build the impression that you will be able to give a lot more in this new job.
If you are currently employed, make sure that you do not sound desperate to escape from your job. You must provide illustrations of the way you could contribute to the position for which you have applied.