There was times I thought it was ok. But then ya they went to heavy with them. Where it should have ended, and ollie be with dinah.
I didn't have issue with it when both characters were on the show, what annoyed me in Season 10 when Ollie's purpose became bringing up Chloe every episode she wasn't on.
Honestly couldn't they just come up with a simpler plot Chloe left for whatever reason(that doesn't involve her getting kidnapped) and comes back in Collateral and cut out al the Ollie whining where is Chloe.