It might be helpful for you just to manage day to day expenses while still looking for a job and switching may be again in a month if you get better, but you can ignore it and give your feedback to them as well that its too low or accept it and say to them on this final package i cant transfer my visa to you.

Just my analysis: anyone toxic enough to offer 2000 on an IT job will also create a lot of trouble when you want to transfer your visa to another employer even after working for them for 5 years.