Very difficult to take off on 172

Video of take off on 172 very unstable

Also on take off plane veers to the left

I find after initial climb plane loses altitude fast despite light press of stick and trim up

Also I get an audio voice of ‘dont sink’ sounding
Which i cannot switch off

The pitch trim in the aircraft is set to 0.0 degrees in the cockpit before take off. The rectangular pitch indicator is level with the triangular symbol

Flaps set to 10 degrees

This plane is impossible to fly and way harder than cessna 152

So i dont know what the problem is here