"just pretend you can't do X" is one of the worst responses to people raising legitimate points going around.
Don't like shove? Don't use it? Don't like stealth bonus action? Don't use it! Don't like..
At some point the game should function well when people are playing the... You know... Actual game, not having to make up their own rules for everything to try and make the experience better.
This mechanic is one of them, and something simple like a cumulative count per combat after which a character dies is a pretty simple and reasonable one.
Just looks like an excuse to bitch about something to me.
"Look at this thing I keep doing that I don't want to do."
How is it substantially different from: "The game allows six character, but only use four if you only want four."