There are three distinct types of  I wish / if only  sentences:-

1 - REGRETS with the PAST PERFECT (the third conditional) e.g. I wish I hadn't got so angry.

2 - WANTING CHANGE FOR THE PRESENT OR FUTURE with the PAST SIMPLE e.g. I wish I had enough money to go to Mozambique this summer.

3 - COMPLAINTS with WOULD + INFINITIVE e.g. I wish you wouldn't arrive so late all the time.