While your statement isnt wrong, its also fair to say that 40% of your team is in botlane.
5 players, 100% divided among them is 20% each, and since two players are in the bot lane thats almost half your team. If almost half of your team is doing badly then it shouldnt be a major surprise that youre losing. That said, try to help bot lane out.
I see junglers camping top a lot... why? It stands to reason the best lane to help is bot lane because you can set "almost half" (40%) of your team up with an advantage, and even pick up some gold yourself. This strong bot lane then will pressure mid lane too. This will mean that your mid lane will then have some pressure on the top lane.
Like it or not the highest concentration of players for half the match is in bot lane, and if you want to win overall you want to shit on the enemy bot lane, and help yours out. Im not saying this is HOW IT SHOULD BE, but I am saying its HOW IT IS. For what its worth, its how its always going to be to some degree. You cant expect 40% of your team to get shit all over and it not matter at all.
As for that Veigar with all that farm, he will matter, he will be really good at killing things attacking his ADC... its all in how you look at things.