What specs? They usually dont have specs on Ebay
Maybe they meant surge current for 1ms. ...arg.
Yes the Load regulation is essential the inverse of the output ESR where 50% load regulation uses a load equal to ESR of source.
Active Load
1) Use a power Darlington transistor and bias that easily with any 10k pot with gain from 1k to 10k.
2) Add a current sense R ( 100mV at max current. using AWG 30 if none around.
If you fold in half magnet wire and twist, the inductance tends to cancels out.
3) keep circuit small and low inductive as possible measure Isense voltage a > few mm away from ends ( Kelvin method)
0.25V drop with 0.15A means ESR =1.67 so for 1% load regulation, load must be 100x or 167 Ohms or 5/167 = 30mA which is typical for a super small LDO.
I suggest you either blew it with ESD or you have been misled on specs.