Firstly, The FTB Team work hard to bring you what you get, a stable launcher, wonderfully designed modpacks, a dedicated team of people. If you don't like how big the modpack are, remove mods, tell the modpack team, do something about it.
Secondly, please enclose that...short log in spoilers, or remove it.
Thirdly, that isn't a proper log, follow these steps:
- Launch the FTB Launcher, go to the options tab and tick the tick boxes named "Show Console?" and "Reopen launcher after exiting Minecraft?".
- Launch the modpack you want to play to repeat the problem.
- Go to the console and click "Paste log to pastebin.com" once the game crashes.
Then come back here, give us the link to the log and we'll be able to help you.