Opponent getting extra time when playing bullet

In 60% of the games in bullet,my opponent gets more time.You can't be losing a bullet game when you are playing 220 points less opponent with him having more than 20 seconds on the clock.In one case,my opponent had 0.8 s on the clock and I had around 7 s.But with each move he played,he got around 0.5 s more,and the game ended with me having 0.7 s and he still have 1.2 s on the clock.If the site don't resolve this problem,I have decided to quit this site.My network is good and all other pages in the web are very responsive.This problem happens both on WiFi and also on mobile data.My rating keeps on dropping (now a 150 points below my normal performance) even if I am improving on the game.The problem is on there during 3 min blitz also but its less problematic.I feel I am playing with time odds.Anyone having same problem?It's very demotivating to continue like this.

 You must be experiencing lag adjustments.

https://support.chess.com/customer/en/portal/articles/1444849-why-did-the-clock-times-suddenly-change-the-clocks-seem-broken-

It seems like opponents are getting extra time but in reality, the clocks are just adjusted to reflect actual usage of time.

From what I can see, your normal performance was below 750 until very recently. Then it shot upwards to establish a new normal around 1250. Your current rating is only a little below that. You should have more patience.