I worked as a DJ at a couple radio stations in my early adult-hood. First Class Engineers came and went rather regularly. But, one thing for sure, each new engineer was ALWAYS critical of the previous engineers work and set about changing everything. When it comes to computers, I see the same thing. I'm no expert, but experience has shown me what works and what doesn't. Malwarebytes is highly recommended (I like it) but it is not without its critics. Some love Norton's security programs. I'm not a fan. But if you like it and it works for you....why not? AVG, Avast. Avira...All seem to work just fine. But as stated earlier, use only one anti-virus program.
Eddie