I dont think that your unlucky it justs happens that away
sometimes. I have had bad 2 strokes form the factory.
2 Enya 40 throwed the rod upon start. Enya has a good warrenty
and they repaired them and ran great.
3 suppertiger 40 of wich all had carb seal problems.

Now this has been some time ago and sense i went to
all four stroke engines i have yet to have a bad one.
Might be do to the fact that all i use i OS,SAITO,YS engines.
I have more SAITO engines(9) than any of the other.