I'm on the last season and I'm rewatching episodes I'd only seen once.
This dude really killed Mike for nothing.
I get him trying to deal with Gus (he wanted to kill him), but, he steps in a game he really knows nothing about and gets all the chances to back out.
I got him wanting to deal with snitches, but, the Czech stuff is just stupid when it's just him selling without an estranged wife and DEA bro-in-law.