People seriously don't understand some items/spells

Playin taric, doing ok, except when we go to seige bot, i say 'protect zzrot' and place it down, my whole team runs off to fight in mid... this happens 3 more times, so in the end i just sell it. Another part, I ult, people seemthink 'BIG GLOWING AOE AROUND 2 OF OUR TEAM RUN AWAAAY', another example, my team is trapped around a corner, lee is the only one able to get over and help, I pop my ult expecting him to jump to the two to give me time to get around, he e's to me and i get flamed for a bad ult. I would complain about my e but since i can aim it, its not as bad Please can we add a big message on screen maybe saying 'Protect the portal' or 'Hug the taric'