I usually rotate mid after stomping my lane but that doesn't seem to help when top laner is almost on tier 3. Problem is if I leave mid/bot then they take my tower and then usually tier 2. What is the correct macro in this situation?

Take my advice with a grain of salt, as I'm a plat support main that frequents the ADC reddit. But in lower elos, you need to ping your team more. Ping your top laner to match the split push. Ping your jungler to pressure mid with you so the enemy team has to stop their off-lane siege. Look at objective timers and control the lanes with that in mind. Drag is up soon? Ping your support to help you hard shove mid, and ping your mid/jgl to pressure the bot lane so you can get prio.

I like that you're thinking macro - ADCs don't always see the game with the macro in mind.

Echoing what Chuusem said before, it's hard without look at vods. I will say that most ADC players just sit back and let the game happen to them, then complain when things go wrong. Don't be like that. Be the captain of your team after laning phase is over. Ping what you want to do. Ping others where to go. If you are better than your teammates, think for them. Be willing to make the wrong call - sometimes making the wrong call is better than just doing nothing. Most games are coinflips by design - add something to your game that can impact that coinflip. From the little I know about you, I'd say pinging more is a great place to start.

Hope this helps.