Slide 2 & 3: Yes, 1st generation blockchains are slow and have high fees. That's why Bitcoin has just implemented the Lightning Network and there are 3rd generation blockchains like Nano and IOTA that have zero fees and instant transactions. Duh.
Slide 4: False dichotomy. Yes, there are a couple of scams in the crypto sphere, even 5% of the top 100 are scams, e.g. Eos, Verge, Veritaseum. Is 5% 100%? No. Duh + Facepalm.