I’ve been told that out of all of the former New World British colonies that got their independence (Jamaica, Belize, Trinidad, etc.), Guyana turned out to be the worst of the lot.
Of the three, I’ve only been to Jamaica. I count it as two trips, since the visit was both my first and last time there. And that was to the good tourist side of the island. I’ve heard Kingston is much worse.
On the other hand, I’ve only heard nice things about Belize.