I have a 2000 Hyundai accent, and have had to replace several components on this car, none of which were covered by the warranty of course. It all started with a tune up I had two years ago. A couple of weeks later, my engine came on. Had to have the Oxygen sensor replaced. Next thing to go, was a pipe for the xhaust. No problem I'm thinking, no big deal. Well, now I just had it in for it's yearly tuneup, as my engine light has been on for a couple of months (I just ignored it) and turns out that I had to have a coil replaced. OK, so $500 later for that and the tuneup, and the dealer just called me now saying I need a VALVE JOB. What is the deal with that? Who else has had this done, any canadians at all, as I'm in Ontario. They say it's a minimum of $1000, and I'm seriously thinking of just selling this thing.
Your experience looks terrible. There's only one real problem with selling a Hyundai, their re-sale value is the absolute worst in Canada. So its your choice whether to sell it for practically nothing or keep it and throw money at it. It seems you want a reliable car, go Japanese with Honda or Toyota if you perform regular maintenance both Honda and Toyota cars can go for 10 years mostly problem-free, should you be disappointed with them their re-sale value is far better than any other car brand.
Here in Greece the majority of car rental businesses buy Accents for their first batch of cars because they are cheap, low maintenance and hassle free cars. I guess you must have gotten a bad deal.