What doesn't support you.., cut it off... ?
yes and no (it's according to scenario)

It's usually bad practice to usually cut it off or there is measured ways to step things down and shut them off... so ACTUALLY I'm asking you to be super-honest and admit what you know is coming in bad relationships or combinations that you know are problematic- then YES if you can't ask to go slower or see things are ignored then CUT!

TL;DR
Analyse
Make list of good points,
Plan a bit or just make do with le$$ bad
(maybe some step or 2 in between)
cut / dump (end nicely or end without making it obvious / as leaving has it's place but also can be gracefully done, like 'graceful disconnects')