So would I be right in saying due that due to ASIC miners it's not profitable anymore to mine by GPU for bitcoin or even litecoin now?
Correct. ASICs blow them out of the water. But the bigger problem is the stranglehold ASIC makers have over any coin that uses them. It's a super specialised area and a very hard one to succeed so this breeds centralisation.
That's why many people favour GPU mining. The actual hardware makers probably don't actually want anything to do with cryptocurrencies which makes for a much healthier situation.
Because ASICs are otherwise totally useless it's only natural that the people designing and making them will mine with them too, and hoard them.