2 sentences

1. 他满腹是屈，却不知道向谁倾诉。

   tā mǎn​fù shì qū, què bù zhī​dào xiàng shéi qīng​sù.

   He was full of grievances but didn't know who to tell.

   Source: Dong Chinese Dictionary

2. 他满腹牢骚，总觉得自己受到了不公平的对待。

   tā mǎn​fù láo​sāo, zǒng jué​de zì​jǐ shòu​dào le bù gōng​píng de duì​dài.

   He is full of complaints and always feels he is being treated unfairly.

   Source: Dong Chinese Dictionary