Yes. Corbyn has been a long-term left-wing Eurosceptic, who opposed membership of the EC in 1975 and acted consistently with that view until the recent referendum.

While his public statements during the referendum supported remaining in the EU, I would argue that the general consensus among most of the "remain" campaigners was that his support was lukewarm at best (e.g. http://www.bbc.co.uk/news/av/uk-politics-eu-referendum-36506...).

In reality, the Labour Party membership are broadly not Eurosceptic, and it's my view that Corbyn mostly has to toe a non-too-Eurosceptic line, especially given the support he has among generally pro-EU young people that brought him to power in the first place.

At present, the Labour Party's position on Brexit is hopelessly muddled, something along the lines of "We don't want to remain in the single market but we kind of want something maybe sort of similar". There is no discussion about remaining in the EU.

I'm sorry I can't provide you with a much better source at the moment, but it's more complex than a quote saying "I love Brexit".

>>> He campaigned against it all around the country before the referendum.

He absolutely did not nor did he participate in any of the public debates prior to the referendum. He strategically remained quiet.