Lencho's Attitude Towards Men
Lencho's attitude towards men can be seen as negative based on his statement calling the post office employees a bunch of crooks. This shows that he has a general distrust or contempt for people in authority or those who work in certain professions.

Lack of Trust
Lencho's accusation of the post office employees being crooks indicates a lack of trust in their integrity. He assumes that they are dishonest or deceitful, which demonstrates his cynical view of people in positions of power or responsibility.

Prejudice
Lencho's sweeping statement about the post office employees suggests a prejudiced attitude towards them. By labeling them as crooks without any evidence or specific reason, he shows a willingness to judge others based on stereotypes or preconceived notions.

Disrespect
Referring to the post office employees in such a derogatory manner also reflects a lack of respect for them as individuals. Lencho's choice of words conveys a dismissive and contemptuous attitude towards the people he is addressing.

Overall Impression
In conclusion, Lencho's comment about the post office employees being crooks reveals a negative attitude towards men in general. His lack of trust, prejudice, and disrespect towards them indicate a cynical and suspicious perspective on human nature.