Your options are pleading guilty, pleading not guilty if you have not yet entered a plea, coming up with money to pay a lawyer to represent you, ask for a public defender (PD), or represent yourself. By far the worst of those is the last one: representing yourself. You aren't an attorney and you don't know the rules of procedure and evidence, nor do you have any experience in dealing with the prosecutor. You could easily say or do something representing yourself that makes matters worse, not better. Rarely have I seen a defendant represent himself/herself and come away better than what a PD can do for them. The PD's deal with the prosecutors often and have a good idea what kind of plea deals they are likely to offer/accept. They also know when and how to challenge the state if the cops screwed something up in the investigation and arrest. They'll spot things that you don't have the experience to know might be a problem.
The public defender is an attorney. Like with private attorneys and prosecutors, a few PDs are really great, a few of them are really terrible and most are somewhere in the middle. You had a bad experience with one PD. That doesn't mean that they are all that way anymore than having one bad customer service experience with a store cashier means that all cashiers are that way. But even with a bad attorney you are better off than representing yourself. If the lawyer does a truly bad job representing you then you can file a motion for a new trial with a different lawyer citing ineffective assistance of counsel. If you represent yourself and screw it up, you have no option for a do over as a result of your mistakes.