I choose a MAC over a Windows for excel heavy job

I am intern at a big multinational corporation and I received an email saying that I can choose between a thinkpad or a new macbook m4. Long story short I choose the Mac but now I read excel is really bad on it. I mostly have to upload information to a data base manually or V-LOOKUP things. Handle invoices, create new data bases based on sales and update already existing excel tables tracking sales. This is 50% of my job. Am I screwed?