Hello,

I check the log, there are two questions?

1. have you tried to disable ufw? does it help?
2. did you run iperf test to check the wireless throughput?

I found there is a Wi-Fi firmware crash inside the log, but I am not sure if it is the root cause,  Generally, the driver should have recovery mechanism after the micorcode crash. There is a newer iwlwifi-QuZ-a0-hr-b0-59.ucode firmware in https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/linux-firmware.git/, would you mind to have it a try?

About the firmware crash:
[105396.990450] iwlwifi 0000:00:14.3: Microcode SW error detected. Restarting 0x0.
[105396.990539] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
[105396.990541] iwlwifi 0000:00:14.3: Status: 0x00000040, count: 6
[105396.990543] iwlwifi 0000:00:14.3: Loaded firmware version: 55.d9698065.0 QuZ-a0-hr-b0-55.ucode
[105396.990545] iwlwifi 0000:00:14.3: 0x00000071 | NMI_INTERRUPT_UMAC_FATAL    
[105396.990547] iwlwifi 0000:00:14.3: 0x000022F0 | trm_hw_status0
[105396.990548] iwlwifi 0000:00:14.3: 0x00000000 | trm_hw_status1
[105396.990549] iwlwifi 0000:00:14.3: 0x004CA3DE | branchlink2
[105396.990551] iwlwifi 0000:00:14.3: 0x000007F6 | interruptlink1
[105396.990552] iwlwifi 0000:00:14.3: 0x000007F6 | interruptlink2
[105396.990553] iwlwifi 0000:00:14.3: 0x00016504 | data1
[105396.990554] iwlwifi 0000:00:14.3: 0x00001000 | data2
[105396.990555] iwlwifi 0000:00:14.3: 0x00000000 | data3
[105396.990557] iwlwifi 0000:00:14.3: 0x900148E4 | beacon time
[105396.990558] iwlwifi 0000:00:14.3: 0x0C6FF71A | tsf low
[105396.990559] iwlwifi 0000:00:14.3: 0x000001B4 | tsf hi
[105396.990560] iwlwifi 0000:00:14.3: 0x00000000 | time gp1
[105396.990562] iwlwifi 0000:00:14.3: 0x58CF3E54 | time gp2
[105396.990563] iwlwifi 0000:00:14.3: 0x00000001 | uCode revision type
[105396.990564] iwlwifi 0000:00:14.3: 0x00000037 | uCode version major
[105396.990565] iwlwifi 0000:00:14.3: 0xD9698065 | uCode version minor
[105396.990567] iwlwifi 0000:00:14.3: 0x00000351 | hw version
[105396.990568] iwlwifi 0000:00:14.3: 0x00C89004 | board version
[105396.990569] iwlwifi 0000:00:14.3: 0x800FFC03 | hcmd
[105396.990570] iwlwifi 0000:00:14.3: 0x00020000 | isr0
[105396.990572] iwlwifi 0000:00:14.3: 0x00400000 | isr1
[105396.990573] iwlwifi 0000:00:14.3: 0x08F00002 | isr2
[105396.990574] iwlwifi 0000:00:14.3: 0x04C338C8 | isr3
[105396.990575] iwlwifi 0000:00:14.3: 0x00000000 | isr4
[105396.990577] iwlwifi 0000:00:14.3: 0x05D6001C | last cmd Id
[105396.990578] iwlwifi 0000:00:14.3: 0x00016504 | wait_event
[105396.990579] iwlwifi 0000:00:14.3: 0x000000C4 | l2p_control
[105396.990580] iwlwifi 0000:00:14.3: 0x00000000 | l2p_duration
[105396.990582] iwlwifi 0000:00:14.3: 0x00000007 | l2p_mhvalid
[105396.990583] iwlwifi 0000:00:14.3: 0x00000000 | l2p_addr_match
[105396.990584] iwlwifi 0000:00:14.3: 0x00000009 | lmpm_pmg_sel
[105396.990585] iwlwifi 0000:00:14.3: 0x00000000 | timestamp
[105396.990586] iwlwifi 0000:00:14.3: 0x0000C0D4 | flow_handler
[105396.990628] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
[105396.990629] iwlwifi 0000:00:14.3: Status: 0x00000040, count: 7
[105396.990631] iwlwifi 0000:00:14.3: 0x2000307C | ADVANCED_SYSASSERT
[105396.990632] iwlwifi 0000:00:14.3: 0x00000000 | umac branchlink1
[105396.990633] iwlwifi 0000:00:14.3: 0x80465D2E | umac branchlink2
[105396.990634] iwlwifi 0000:00:14.3: 0x80473128 | umac interruptlink1
[105396.990635] iwlwifi 0000:00:14.3: 0x00000000 | umac interruptlink2
[105396.990637] iwlwifi 0000:00:14.3: 0x00000000 | umac data1
[105396.990638] iwlwifi 0000:00:14.3: 0xDEADBEEF | umac data2
[105396.990639] iwlwifi 0000:00:14.3: 0xDEADBEEF | umac data3
[105396.990640] iwlwifi 0000:00:14.3: 0x00000037 | umac major
[105396.990641] iwlwifi 0000:00:14.3: 0xD9698065 | umac minor
[105396.990642] iwlwifi 0000:00:14.3: 0x58CF3E47 | frame pointer
[105396.990644] iwlwifi 0000:00:14.3: 0xC0885EB0 | stack pointer
[105396.990645] iwlwifi 0000:00:14.3: 0x0080010D | last host cmd
[105396.990646] iwlwifi 0000:00:14.3: 0x00000000 | isr status reg
[105396.990668] iwlwifi 0000:00:14.3: Fseq Registers:
[105396.990691] iwlwifi 0000:00:14.3: 0x60000000 | FSEQ_ERROR_CODE
[105396.990694] iwlwifi 0000:00:14.3: 0x80290033 | FSEQ_TOP_INIT_VERSION
[105396.990717] iwlwifi 0000:00:14.3: 0x00090006 | FSEQ_CNVIO_INIT_VERSION
[105396.990748] iwlwifi 0000:00:14.3: 0x0000A482 | FSEQ_OTP_VERSION
[105396.990764] iwlwifi 0000:00:14.3: 0x00000003 | FSEQ_TOP_CONTENT_VERSION
[105396.990787] iwlwifi 0000:00:14.3: 0x4552414E | FSEQ_ALIVE_TOKEN
[105396.990808] iwlwifi 0000:00:14.3: 0x20000302 | FSEQ_CNVI_ID
[105396.990811] iwlwifi 0000:00:14.3: 0x01300504 | FSEQ_CNVR_ID
[105396.990834] iwlwifi 0000:00:14.3: 0x20000302 | CNVI_AUX_MISC_CHIP
[105396.990841] iwlwifi 0000:00:14.3: 0x01300504 | CNVR_AUX_MISC_CHIP
[105396.990868] iwlwifi 0000:00:14.3: 0x05B0905B | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
[105396.990887] iwlwifi 0000:00:14.3: 0x0000025B | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
[105396.991043] iwlwifi 0000:00:14.3: WRT: Collecting data: ini trigger 5 fired.