> I'm not an investor, but I would quality deal flow is definitely a challenge. The biggest challenge, probably.
You are not an investor and using such definite statements. Hmm... You might want to consider talking to angels about challenges.
With your criticism of AngelList and replies to other, you come across as someone who is looking from the viewpoint of a "founder" instead of "angel". Look critically at your positions and consider validating them.
AngelList sucks for finding angels. You can find people that are supposedly angel investors, but to me, it's not clear if they are legit and mostly there is no way to contact them. Even if there was, there is no filter for the angels to increase their deal flow quality.
I agree, if someone were to do this, they should look at what can be done better. Unfortunately, I don't care enough about this to do it. Currently :-)
Edit: Added part about AngelList