An anchor is only as good as the seabed under it and the angle of the rode above it. Kuwait's inshore ground is mostly sand and soft mud, with rock and old coral patches scattered through it, so the anchor that bites in one spot can skate across another. The fix is to match the anchor to the bottom and set it properly.
Carry a main anchor suited to your usual ground and a second, different type as backup. Two anchors of the same kind fail in the same place.
Anchor weight follows boat length, windage and anchor design, so use the manufacturer's table for your hull rather than guessing. As a working rule, chain holds better and chafes less, while rope is lighter to handle and easier to retrieve by hand. Many small boats run a chain leader on a rope rode.
Scope is the ratio of rode length to the depth from bow roller to seabed. Around 5:1 for rope and 3:1 for chain is general guidance in calm conditions; add more in wind, swell or for an overnight stay. Check the tide times in the B7R app, measure the depth, multiply, and pay out that much, not what looks about right.
If the anchor will not come free, motor slowly forward past it with the rode near vertical, and let the change of angle pull the flukes out. Take a turn around a cleat and use the boat's weight gently, never by hand or winch with anyone near the line. If it stays stuck in rock, buoy the line, mark the position and return with a trip line or a diver.
Never anchor on reef or coral: the anchor breaks living structure and usually fouls too. Watch other boats swinging on a different radius, and keep clear of swimmers, dive flags and moorings. Leave enough distance that a wind shift does not put you on top of your neighbour, and stay aboard if the weather is building.
Good anchoring is a habit, not a gadget. Check the seabed, set with power, verify with transits, and recheck when the tide turns. For tide times at Shuwaikh and Shuaiba plus sea state before you leave, the B7R app is free on Google Play with a fish guide, catch log and marine tools: https://play.google.com/store/apps/details?id=com.q8dm.b7r