Admittedly he only had two years, but he did beef up the educational curruculum with more history and culture.
Which is completely useless in today's world. We don't need people to have an encyclopaedic knowledge of Polish history, we need people that can do mathematics and science.
More importantly, he believed the school should not only teach facts, but should bring pupils up to be decent, patriotic Poles.
Which is why the educational establishment hated him so much - schools are not for indoctrinating pupils with any one belief. His version of "patriotism" was soundly rejected.
Lefitst, gfloablisst and assorted one-worlders of course reject such ideas, so that makes Giertych the bad guy in their books.
No, they rejected him because he was putting nonsense first.
History - mostly - won't put food on your table.
What was interesting was that he completely failed to actually reform - well - anything. His greatest success was banning mobile phones in all schools - which did nothing but irritate everyone.
Like a mantra your keep repeating the notion of other parties ganging up on poor PiS.
Which is exactly what was happening elsewhere.
At present PiS-PSL seems the most plausible to me.
The PSL won't risk electoral suicide to enter coalition with Kaczynski. They know what happened to LPR and Samobroona - and they won't risk their position in Polish politics for that.
But if Tusk and Kaczyński somehow managed to rise above their petty ambitions, PiS-PO would be possible. Recall how that coaltion was to have been created but failed to materialise. PO came up with all kinds of weird proposal like holding coaltion talks on live TV -- something never done anywhere. PiS grudgingly consented but piolticians ended up smiling at the cameras, adjusting theri ties (the slob chic hadn't set in yet!) and nothing came of it.
Too many personality conflicts. PiS wanted to control the power in Poland, PO didn't want to allow them total control - which was fair enough.
Although they lost, PO were offered the same number of cabinet posts as PiS but still kept bickering until the whole project fell through and Kaczyński was forced to seek outside help. Giertych was OK, but Lepper was a total flop..
I think PO wisely realised that staying away from power for 2 years made a lot of sense - they let PiS make a mess of things and walked into power as a result. Had they shared power, they would've taken the fall along with PiS.