With the purple upgrades it does get easier. Try doing a level 3 or higher mission with level 2 blues. It is doable but semi difficult. If it's very easy for you, you can challenge yourself by using lower level upgrades.
Must be doing the lower tier missions. Try doing the high level missions flying through a mine field and asteroids then go afk for 2 minutes and see what happens.
Except that it wasnt the OP that posted what you are replying to. Also if you look one post above yours you will see a SS of the Boss the OP just killed and note that the Boss is 1 level higher not 5.