Issues with new Macs: Hardware makes them difficult for me to use. What options might be available in the future?
Start a conversation with your IT department about using Linux (possibly alongside Macs, it doesn't have to be a replacement).  Don't just assume they can't/won't support it: go and actually put your case to them.  It sounds like you're not the only person in your company with these concerns.

(I know, this isn't likely to get a lot of votes on an Apple-centric site.  And I used to like my iMac a lot, but haven't tried the new machines that are bothering you.  But, given your constraints, I think this is the right answer to your question.)


  ...pure Linux would work fine (for home) but in the (larger) companies
  it is not supported (security apps, wifi, productivity apps etc)


Where do you get this idea from?  It simply isn't true: plenty of large companies have been using Linux for many years.