Turn Signal Switch problems of the 2004 Hyundai Tiburon

My 2004 Hyundai Tiburon suffers from a long list of electrical problems. Both power window motors have stopped working, my power trunk latch is defective, the interior light switch doesn't work, and now the turn signal relay that is part of the body control module has caused intermittent problems with my left turn signal. Sometimes it stays on even after turning off the car. I'm worried I may be rear-ended because although my signal is on, it sometimes does not flash properly due to the faulty bcm. Research indicates these are very common issues with Hyundai vehicles, and very expensive to repair. The bcm is about $700 alone. The window motors are about $300 each. It is ridiculous to pay $700 for a signal light. Hyundai should be held accountable for shoddy engineering!.