What's with the assumption that you are quitting a job because it sucks? A lot of times people have to quit or change jobs for their own reasons and only have positive things to say.
And if the job does suck, who cares if you burn bridges there on the way out? You only need to maintain bridges that go to good places.
> who cares if you burn bridges there on the way out? You only need to maintain bridges that go to good places.
There are only potential personal material downsides to burning bridges, e.g. you might need a contact one day in the previous company. There is no personal material upside for burning bridges.
And if the job does suck, who cares if you burn bridges there on the way out? You only need to maintain bridges that go to good places.