I don't know why they have to "smear" him or play dirty.
It's certainly part of it - but remember, everyone in Wroclaw has been gaining in recent times, not just the politicians. If you look at the differences between Wroclaw and Poznan, it's pretty clear which city is winning the race these days. Like it or hate it, he's done an absolutely amazing job of attracting inward investment to not just Wroclaw, but the whole Dolnoslaskie region.
As for why the opposition doesn't do it - would they dare? His personal popularity is such that it's unlikely that anyone would believe them. But I think what you're saying is the same story all over Poland.
Wait, do you even know who Janicki is? Do you even know how corrupt the courts are in Wroclaw? Do you even live in Wroclaw?
Polish courts, corrupt? Come on, we all know that the justice system is broken in Poland as a whole. As for living there - I'm there almost every month.
Edit: You mentioned he's powerful. He's not. But he's got a few heavy backers behind him as long as he toes the line. You can see it by how he laps up everything Solorz did and does.
Having heavy backers and immense personal influence says to me that he has power. You only need to see how he pops up everywhere to see that the man enjoys a lot of support from the powers that be - and as I said, if he was to start translating this into coalition building at the local level (where parties are traditionally very weak) - he could have them on the back foot. The current situation where he stays in Dolnoslaskie suits everyone, I think.
Great news from today (or actually two days ago), 50% of MPK's buses inspected actually had their registration taken away after a quick check by the ITD. 50%...
I don't even want to start talking about that useless ******* excuse for a public transport company. I tried to hire a tram from them for a corporate event. I started 6 months in advance, and was constantly told to "call in a few weeks'. It got to around 2 months before the event, when it was discovered that they couldn't supply a tram after all (despite saying that they could, just that signing the contract had to wait). Then they offered to supply a bus, which was grudgingly agreed to - only to back out of that a few weeks later. A total, complete joke of a company.
(and yes, Dutkiewicz should be hammered for that - the state of Wroclaw MPK is unbelievable, and I'm not surprised that 50% of the buses were taken off the road.)