She would have to grow first and strengthen her finances to get suitable equipment.
That was her decision after examining the game, meaning she wasn't going to participate in team battles in the short term.
Did those who chose the assassin knew the impact of their attacks?
Not all of them. The long-range archer and a few attacking sorcerers were the main attackers.
In normal circumstances, those using the assassin would have strict emphasis on the maneuvering. More importantly, they would have to examine the battle situation and decide when to attack, retreat, or retaliate.
The advantage of an assassin was their high speed and explosive impact, but those who assumed an assassin to bolt forward without regard like a tanker were utterly wrong.
It was obvious that was how the sorcerer and tank in the middle lane thought.