We're sorry that your experience with Startup School last year wasn't great. That was not our intention, and hopefully you'll give us another shot.
You're definitely right that we were scrambling in the last minute to build software and adjust the program to better cater to the large number of companies in 2018.
As Kyle also mentioned in this thread, we spent a lot of time listening to the community and have made quite a few new changes and improvements for 2019 to better support the program at this scale and improve the experience for founders.
We'll also be taking Startup School on the road to meet SUS founders across the globe and will have YC alumni and partners participating in the Forum to help advise.
You can sign up directly at startupschool.org, under 'Sign Up'. Here's a direct link in case you're having issues: https://www.startupschool.org/register.
We'll be sharing more on how that works in the near future, but essentially we've built a few features to help you connect with other founders in the community. You're under no obligation to partner with someone -- we just wanted to give founders the tools to connect with one another.
However you decide to continue interacting with the founders you meet is entirely up to you.
This year we're opening Startup School to all active startups -- all you have to do is sign up / re-enroll, and you're in. As long as you have your profile updated by July 22nd, you should be set.