Why do we explicitly need to ask for help through prayer? Since God is omniscient not only does he know all of our hardships but he also knows that we want him to help us through said hardships. Why do we explicitly ask for help through prayer?
We ask for help and for what we need in prayer because God delights in it.

I urge, then, first of all, that petitions, prayers, intercession and thanksgiving be made for all people— 2 for kings and all those in authority, that we may live peaceful and quiet lives in all godliness and holiness. 3 This is good, and pleases God our Savior 1 Tim 2:1-3

We also pray so that our thoughts become aligned with God's. The Lord's prayer makes it a point to specifically say that God's will be done on Earth.

7 And when you pray, do not keep on babbling like pagans, for they think they will be heard because of their many words. 8 Do not be like them, for your Father knows what you need before you ask him.
9 “This, then, is how you should pray:
“‘Our Father in heaven,
hallowed be your name,
10 your kingdom come,
your will be done,
on earth as it is in heaven.
11 Give us today our daily bread.
12 And forgive us our debts,
as we also have forgiven our debtors.
13 And lead us not into temptation,
but deliver us from the evil one.’ Matt 6:7-13

Jesus, to fully align His thoughts with the Father's, prayed the night He was betrayed.

“My Father, if it is possible, may this cup be taken from me. Yet not as I will, but as you will.” Matt 26:39.

John lays it out more plainly for us.

14 This is the confidence we have in approaching God: that if we ask anything according to his will, he hears us. 15 And if we know that he hears us—whatever we ask—we know that we have what we asked of him. 1 John 5:14-15

When our thoughts are aligned with God's we will ask for what He is to do, anyway. And since our thoughts are aligned with God's we will delight and rejoice in His righteous ways.
So when we are suffering, we pray to the Omniscient God because he likes to hear from us, and He wants us to think like Him, which is always holy and righteous. Then from that perspective, our suffering will seem different than that.