Some questions please

1_What does mean 难不住他 this sentence In English? 
父母赵奢也难不住他。
2_ what does mean 天下,and 放在眼 this sentence In English? 
自以为天下无敌，连父亲也不放在眼里。
3_What does mean this sentence In English? 
自以为天下无敌，连父亲也不放在眼里。

Please write the kanji into hiragana and I can try to help you!

I've never thought about my reasons for learning Japanese as a big deal nor have I been called that. I usually say I like Japan in general. I mean, people learn English for music sometimes I'm sure, but that doesn't mean that they dislike their own culture. I think whoever is saying that is probably ignorant or is in their own little world. I doubt many people think that way also. 

I think they generally mean the same thing but some of the words are more appropriate in certain circumstances/situations. Error is commonly used to replace mistake, malfunction, problem Failure is a strong word meaning you did not meet the standard, were not up to par or on the general passing goal. You had some failures in life is like saying you were not meeting th General standards of what a person should have been living like. Defect is something like an abnormality, or something that causes something not to work properly. Usually it's used with machinery or some sort of problem solving. There has been a defect in your device and it will now restart. - a problem causing it to cease regular/proper functions

The best choice is "I want to mimic your accent" You can also use copy instead of mimic The reason why us because it's a non offensive way of asking for help with sounding out words in the correct way.