How Y Combinator “ruined” my startup

This appears more linkbait than anything. Ycombinator had nothing to do with your start-up. They didn't ruin it, you likely never had it already. You never had a Founders agreement, or anything concrete with the two people you were calling "technical cofounders". You never even applied to YC, so how could it have been responsible for ruining your startup?

If you really feel your startup is ruined by these events, I'd argue you never had a startup, you just had an idea you were working on, and gave up on too easily.

i thought u were going to say that your other two co-founders took your idea and continued working on it without you! certainly hope that is not the case!