What is your real issue? According to Travel USA visa bulletin, the EB2 is current n EB3 is April 2019. Visa are still available if your are with in the US. What’s your degree on? Some degrees are just hard to apply. You can always talk to DSO and apply hardship n work outside. It’s much easier to apply if you work in non profit or worked as a medical professional. Go and work in summer wherever who cares. The F1 laws been sane, nothing have changed. May be they screen applicants more, but I doubt anything changed for Nepal. In coming years, they will get more applicants because USCIS is kinda run out of money.