On regards to the elections, let's see if she gets kicked out.
No. In the latest Eurobarometer, confidence in the EU is one of the lowest in Spain. 54% of respondents do not trust the EU, vs. e.g. 21% in Lithuania or 31% in Denmark.
http://ec.europa.eu/commfrontoffice/publicopinion/index.cfm/...
When asked about membership in the EU, the answer is also more positive than average, although in a more modest 9th place (http://www.europarl.europa.eu/at-your-service/files/be-heard... page 37).
So it depends on how you ask. I would say saying that Spain is the least anti EU country is quite an overstatement, but it's definitely more pro-EU than average.
I think the results of the question on trust may be biased by the fact that Spanish people don't trust politicians in general. In page 6 of this Eurobarometer survey (https://ec.europa.eu/spain/sites/spain/files/eb88_nat_es_es.... - sorry, in Spanish, I couldn't find it in English) you can see that while trust in the EU is not very high, it's quite higher than trust in the Spanish government. So most people wouldn't want to leave the EU.