It also goes the other way. I had 3 junglers basically quit yesterday and just afk farm rest of game. First one was becuase top lane went 1-8. Next one, someone said something to him, and with him being 13/5, he was carrying so the team didn't deserve to win. Next one, he just got completely out jungled by a Lee Sin who invaded him over and over and wrecked him. He blamed his laners for not helping. Sometimes they just can't help. Same as sometimes a jungler just can't gank. But that was 3 games just down the drain, with the jungler blaming his team.
Junglers blame their teammates and laners every bit as much as laners blame them; justified or not. As a jungler, you do get TOO much blame. But at the same time, junglers don't want to accept ANY blame. Its a conundrum. As a jungler, you arent exactly "losing lane." The worst you are probably going to do is not ganking or being 0/0/0 10 minutes into the game. Neither of those are as noticeable as dying 3 times in lane or being down 30cs. But they have just as much affect on the game, if not more so, since the jungler position is by far the most impactful role in the game. A good jungler can single handedly win the game in the first 10 minutes.
But yes, this is not some hate on junglers. The players in every position are not exactly different. Ive seen as many toxic supports towards their ADCs as vice versa.
But in the end, while junglers get too much blame, they don't accept enough blame themselves. If you are an early game jungler and have did nothing but farm and you are 0/0/0 while the other jungler is 5/0, its not just your laner's faults; its yours. You can't accept all the praise and none of the blame. Every now and then when I do jungle, there are games where I'm not feeding; I'm not actively losing the game. But I'm literally doing nothing while the enemy jungler is just competely outclassing me. Its my fault, even though its not as apparent as being down 30cs and 1-2 kills in lane.
Edit: Just had a 4th jungler intentionally throw the game. 48 minutes of time wasted because Kha got mad. Because hes making all the plays and doing all the carrying, we deserve to lose.