League needs a tutorial on team comps

It's been the third time today that I get the same thing and I dodge, so while my dodge penalty is ticking I want to ask for one thing that is clearly missing: an official, easily accessible tutorial on building team comps. I'm tired of people picking 4 squishy ad champions with no cc or engage tools and leaving me to last pick a support. Meanwhile, the enemy team has at least 1 tanky champion who will be happy to build armor, and also someone with hard engage.

A balanced team needs to have some sort of synergy between champions, but if this concept is too hard to grasp, make sure you have a frontline, some hard cc and possibly mixed damage.