Hi,
Your schematic is a bit messy. Please correct placement and wiring of R1, R2, C1 ... and similar confusing wiring.
Mind: a schematic should be easy to read.
--> Usually one chooses meaningful component placement to get short wires and low wire crossing count.
Who designed this schematic? Show us the original schematic or post a link.
The schematic differs a lot from datasheet schematic. It surely can't work this way. There are a lot of issues.
Most of all: Where are your MOSFETs?
Klaus