"I think compared to two years ago, we have made a huge step forward. We must also bear in mind we were very often fighting with Ferrari, and if you consider the size of the team and the budget we have, I think it wasn't too bad.
"You can't always expect more but I am always expecting more. It is how it is."
Alfa Romeo finished eighth in the constructors' championship last season above Haas and Williams, with drivers Antonio Giovinazzi and Kimi Raikkonen sharing the scoring with four points apiece.
After such a demanding season, Vasseur said he will now switch his focus to the future ahead of talks over his own situation.
"We had a very difficult season," he added. "First on the technical side, we had to react. It was a big challenge, but also on the financial side. The prices were huge for the team.
"Like a couple of teams, we had no guarantee on the price of the solution and the way it impacted us was mega huge and either way, we had to find a solution and now we are focused on the future. We will take the time to discuss this."
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