The 28-year-old Spaniard played an important part in the victory, setting up Jermaine Beckford’s second goal at Goodison Park on Saturday.
“When you have expectations on you it’s hard,” he explained to BBC Radio Merseyside.
“But I’ve kept working and now I’m finding my form and I’m feeling confident now.”
He went on to say: “I think for creative players it’s even harder. I was trying hard but some things don’t go the way you want them to.”
The 2-0 win over Steve Bruce’s Sunderland relieved any faint worries of relegation the Toffees may have had as Arteta’s side have moved up to 10th in the Premier League table. Despite the important victory, Arteta still insists his team did not have the match all their own way.
“I wouldn’t say it was comfortable because before we scored they had a chance to score themselves.
“But I think it made a big difference when Becks [Jermaine Beckford] scored the first one, and the second makes the game much easier.