Tennis scoring

I've been watching Wimbledon this week and it got me thinking about how bizarre the scoring is in tennis. The scores start at 0 (or "love" as it is referred to), and a player's score increases (when a point is won) to 15, then 30, 40 and "game" (game won). Why are the first 2 points worth 15 yet the third one is only worth 10?! If both players get to 40 then it is referred to as "Deuce" and the player who wins the next point gets "advantage", if they win again they win the game, otherwise it returns to deuce. Confused?

It would be so much easier if the scoring went 0-1-2-3-4 and to get rid of deuce the first player to 4 and be more than 2 points clear wins the game, otherwise they keep playing. This is exactly what happens at the moment but in a much more confusing manner.

Also, why if a player "faults" on a serve (i.e. hits it out) do they get another serve? You don't see people in other sports getting a second chance? Lewis Hamilton doesn't get a second chance if he crashes his car, and a 100m runner can't ask for a race to be repeated because he got a bad start!