How long do take you a Full UXUI process? [on hold]

I have a quick question.

How long do take you to complete the full UXUI process for example a completely eCommerce site revamp.

It includes: UX research (stackholder interview, user testing, create personas, user flow, work flow, etc etc, ideation, Mock-ups and prototypes, testing. Also you are alone you don't have an extra hand and working Mo-Fr 8hs.

I am asking that because I feel a little slow in my current job or at least they make me feel slow.

I am the only person doing the whole UXUI design and also the front end developmental and my product manager doesn't stop complaing about I am slow and he wants a very fast delivery. He basically wants all ready (including the front end) in less than 2 weeks.

Is it possible and I am slow? or he doesn't understand the whole process I need to do?

I have tried to speak with him saying I need to do more tasks than just designing a mock-up but like nothing, he keep complaining.

Can someone tell me how long more or less takes to complete a full UXUI project?

I know it is a subjective question but I really want to know if I am slow in comparison with you guys.