Inconsistent internet on mintbook air

Ever since I installed Mint on my 2013 MacBook Air, the WiFi drops off randomly every 3-20 minutes and I have to toggle the internet on and off to get it to reconnect.

I turned off WiFi power management which helped initially. But now the problem has come back.

Here's some info:

I ran iwconfigand got the following:

lo        no wireless extensions.

wlp3s0    IEEE 802.11  ESSID:"the internet"  
          Mode:Managed  Frequency:5.22 GHz  Access Point: 1C:93:7C:26:6F:C9   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

I also ran lspci | grep -i net and got 03:00.0 Network controller: Broadcom Inc. and subsidiaries BCM4360 802.11ac Dual Band Wireless Network Adapter (rev 03)but I'm not sure what to do with this information. Could I have the wrong driver or something?

Any advice would be appreciated!