Slip n fall accident.

history: had ACL reconstruction 10 years ago left knee, recovered and working.
1year 4 month ago had slip accident at company, torn left ACL, torn meniscus badly or complex tear. had 2nd reconstrustion surgery and another surgery for meniscus pain. im on mc for 1year 7 month, only can walk 200meter, cant squat, cant take stairs,cant carry heavy stuff, painfull to kneel. suffer from pain.
I work as heavy duty equipment technician, told by doctor to change job that is sitting/desk job.

accident: company placed a ESD plastic MAT which is slip hazard and placed all over floor.
which caused many slip and fall accident. after my email feedback on slip hazard, management use a double sided tap to tape it to the floor. i happen to be walking around
space constrain area (trolley and equipment) and step on a small mat, slip fell backward, fell on the trolley, my left leg was caught by trolley metal leg and twisted my knee badly.

upon investigation: project manager of plastic mat emitted she did not check for slip
hazard when evaluation period before purchasing it.
but her staff who install the mat knew its dangerous and did nothing.
The safety officer sign off as safe twice and currently project manager put blame on
safety officer for poor safety checks. The safety officer tried to put the blame on me,
saying I did not look where I was walking.
I defended my self asking question: The project manager fail to do proper safety evaluation on slip hazard. she purchase and placed it on the floor which lead to many minor accident(cuts, burses).
Only upon my email feedback on slip hazard, manager took action. They decided to tape to the floor,
But they overlook possibility of adhesive failure, poor installation, failure to check for loose mat that
Might cause accident. Which lead to my serious accident. The mat was removed off the company floor and never used, they are unable to Find safe solution. The manager was re-Assign to another job for her mistake. Company refuse to admit to negligence.- keep saying no fault basis.
Base on this circumstance: what is my chance of winning negligence law suit and what percentage
Of damage warded to me. My ability to compete in job market as drop very low due to Disability.

there are 2 witness to my accident.

Optional Information:
Country relating to Question: Singapore

Already Tried:
pending work injury claim and yet to decide to reject claim and proceed with legal action.