Fyers Historical API is taking too much time to respond

from last 1 week , Historical api performance is really bad , it takes 5-10seconds to respond which is really slow.

There are more bugs like

1. Fyers trading platform doesn't open sometime , chart doesn't load sometimes.

2. CDSL doesn't accept OTP sometimes while pledging a stock

3. Historical api gives empty response sometimes

Fyers is still not stable , I feel like I've to move to Zerodha.