Well at the time the war ended the Stab-In-The-Back Myth was beginning to spread. So basically most of the people did have respect towards the soldiers fighting in WW1 (basically most of the male population). People usually did not give the soldiers a hard time for losing as for the normal german citizen usually other things were responsabile for the defeat in WW1 since many politicians put the guilt towards communists and social democrats rather than the soldiers. This is also why Paul v. Hindenburg was such a well respected person in the Weimar Republic. The only real problems the WW1 veterans had was the challenge to get into normal life again. Many veterans had problems finding jobs because they did not learn a craft or were missing a leg/arm. Thus many former veterans joined the so called Freikorps, which basically were some kind of well organized militia in Weimar Germany, which the government used a lot in the early years to fight the spreading communism in germany ( Spartakusaufstand 1919, Ruhraufstand 1920 etc.).