Konnichiwa Kennin-san!
こんな 目 に あわず に すんだのにね? 俺 の言うことを聞いて いれば お前が最初 から！
I don't know the correct state of affairs, but I translate this sentence literally.
こんな目にあわずにすんだのにね?
You would not have been in trouble, will you?
"こんな目" means a trouble, difficult problem or bitter experience.
"すんだ" means the past and negative tense.
俺の言うことを聞いていれば
If you followed my advice.
"俺の言うこと" means "my advice". "-ていれば" means "if". "聞いて" means a follow, take or listen.
"お前が" means "you", "最初から" means a "from the beginning".
I think this sentence means ...
You would not have been in trouble, will you? if you followed my advice from the beginning!
sorry if my translation is not good.
NANGI