When respawn time changes you risk the balance of the map. Many times people who complain about respawn don't realize that in many cases the map has separate respawn times for each side. Typically the defense has longer respawns than the attacker due to the inherent advantage of defense (but some people don't understand/use that advantage and promptly get eggrolled, hence the whining). One of the things that did suck was accidental suicides which led to much longer respawn time. Thankfully this was fixed with the "finishing off" stat which I commend Valve on.

If you don't want to worry about respawn times then go play arena. Otherwise learn to enjoy the game or GTFO.