Same situation here. Would love to go back but for job opportunities . Now that other companies are open to wfh I think I have to look out.

As for your DSL I too had the same problem and I found stability after I switched to Netgear from Linksys. Have you looked at that?

I disable all the built in Wi-Fi and just use the modem and use a separate Wi-Fi hw so that I don't tax the modem hw.