I'm not good at translation. I just can let you know the meaning. just for your reference. 2 入 means into. you could say set the fishing net into the ocean. 3 using 竟然 or 竟 shows you're surprised. you don't expect that would happen before. 4贪得无厌 贪心/贪 is greedy. 厌 is get tired of / not instereted in sth anymore. 无 is negtive 无厌 means never get tired of, you want more all the time. 贪得无厌 is talking about somebody is greedy. no matter how many/much things he already have, he always ask more.

最后竟把渔夫的小船也拉翻了 maybe can be translated like this. In the end he surprisingly tipped the fisherman's skiff.

1.it is not easy to explain 贪图 and 省事 respectively, 贪图省事 means he takes an easy way out because he doesn't want to be tired. 2.No , not antonyms. 撒 can be regard as a verb in English while 入 should be a preposition, 撒入 can be translated into "cast in" 3.竟 means "surprisingly" and "unexpectedly". 拉 is "pull" 翻 is "make sth reverse" 4.贪得无厌 means greedy and Insatiable.