Microsoft Defender Antivirus is absolutely capable of preventing viruses and malware, coupled with a modern browser such as Microsoft Edge for SmartScreen/PUA protection or Firefox/Chromium with Google SafeBrowsing, you can safely surf the web. A trusted content blocker is recommended for all browsers, either built-in like Brave or an extension (uBlock Origin). For hassle-free browsing, you can choose a Secure DNS with malware blocking.
There is very little need to stack multiple real-time protections when most can be blocked passively.
Is MDA a Basic Antivirus? It is not.
A layered approach is superior to most all-in-one Suites out there - see above.
Microsoft have made massive improvements from it's earlier generations (Windows Live OneCare, Forefront for endpoints, Microsoft Security Essentials, Windows Defender for Windows 8). It's also designed to work silently unlike many noisy Antivirus software, which lead you to make impulsive, and generally poor decisions.
Microsoft's Defender is completely free and does not require a Microsoft Account. Whereas third-party solutions may also require personal information such as your Name, Address, and Card details for on-going paid subscriptions, or registering a free license.
When comparing Microsoft Defender Antivirus to third-party security, most comparisons or sponsored-by sites do not included other Windows Security features that are found exclusively within Windows 10.
All opinions are strictly my own.