My commuting on HST and tube was fine though I did resent paying over £500 for a monthly ticket and still having to stand most of the time.Prior to lockdown I commuted into central London from Zone 6, if not working on client site. Buses arrived when programmed (save for occasional traffic delays, but updated information was displayed at my stop or on various Apps). I never had to wait for more than 3-4 minutes for a Tube train at peak time (Jubilee time). Delays on the Tube were very infrequent and because of this I could predict my commuting time within a couple of minutes.
Friends visiting (remember that?) from the States or Australia are in awe of Public Transport in London, although the cost of it was also a gripe. But over my various tours in London over the last 20 years, public transport has only got better (more regular, more reliable).
ETA: Another strength of public transport in London is that it is a network. As seen after the 7/7 bombings 15 years ago, there are numerous network work-arounds, even when key nodes are knocked out. From my London location I can use buses, tube, overground and network rail links as alternatives. If the Jubilee line is down, I can use other lines. If the Tube network is down, I can use a bus to get to either overground or Network rail nodes. If the buses are out (eg industrial action) a short cycle ride can take me to three different transport modes.
Been WFH for a couple of years, beats the shit out of a commute.